MacOS is a series of graphical operating systems developed and marketed by Apple Inc. since 2001. It is the primary operating system for Apple's Mac family of computers. Within the market of desktop and home computers, by web usage, it is the second most used desktop OS, after Microsoft Windows.macOS is the second major series of Macintosh operating systems. The first is colloquially called the "classic" Mac OS, introduced in 1984, the final release of, Mac OS 9 in 1999; the first desktop version, Mac OS X 10.0, was released in March 2001, with its first update, 10.1, arriving that year. After this, Apple began naming its releases after big cats, which lasted until OS X 10.8 Mountain Lion. Since OS X 10.9 Mavericks, releases have been named after locations in California. Apple shortened the name to "OS X" in 2012 and changed it to "macOS" in 2016, adopting the nomenclature that they were using for their other operating systems, iOS, watchOS, tvOS; the latest version is macOS Mojave, publicly released in September 2018.
Between 1999 and 2009, Apple sold. The initial version, Mac OS X Server 1.0, was released in 1999 with a user interface similar to Mac OS 8.5. After this, new versions were introduced concurrently with the desktop version of Mac OS X. Beginning with Mac OS X 10.7 Lion, the server functions were made available as a separate package on the Mac App Store.macOS is based on technologies developed between 1985 and 1997 at NeXT, a company that Apple co-founder Steve Jobs created after leaving the company. The "X" in Mac OS X and OS X is pronounced as such; the X was a prominent part of the operating system's brand identity and marketing in its early years, but receded in prominence since the release of Snow Leopard in 2009. UNIX 03 certification was achieved for the Intel version of Mac OS X 10.5 Leopard and all releases from Mac OS X 10.6 Snow Leopard up to the current version have UNIX 03 certification. MacOS shares its Unix-based core, named Darwin, many of its frameworks with iOS, tvOS and watchOS.
A modified version of Mac OS X 10.4 Tiger was used for the first-generation Apple TV. Releases of Mac OS X from 1999 to 2005 ran on the PowerPC-based Macs of that period. After Apple announced that they were switching to Intel CPUs from 2006 onwards, versions were released for 32-bit and 64-bit Intel-based Macs. Versions from Mac OS X 10.7 Lion run on 64-bit Intel CPUs, in contrast to the ARM architecture used on iOS and watchOS devices, do not support PowerPC applications. The heritage of what would become macOS had originated at NeXT, a company founded by Steve Jobs following his departure from Apple in 1985. There, the Unix-like NeXTSTEP operating system was developed, launched in 1989; the kernel of NeXTSTEP is based upon the Mach kernel, developed at Carnegie Mellon University, with additional kernel layers and low-level user space code derived from parts of BSD. Its graphical user interface was built on top of an object-oriented GUI toolkit using the Objective-C programming language. Throughout the early 1990s, Apple had tried to create a "next-generation" OS to succeed its classic Mac OS through the Taligent and Gershwin projects, but all of them were abandoned.
This led Apple to purchase NeXT in 1996, allowing NeXTSTEP called OPENSTEP, to serve as the basis for Apple's next generation operating system. This purchase led to Steve Jobs returning to Apple as an interim, the permanent CEO, shepherding the transformation of the programmer-friendly OPENSTEP into a system that would be adopted by Apple's primary market of home users and creative professionals; the project was first code named "Rhapsody" and officially named Mac OS X. Mac OS X was presented as the tenth major version of Apple's operating system for Macintosh computers. Previous Macintosh operating systems were named using Arabic numerals, as with Mac OS 8 and Mac OS 9; the letter "X" in Mac OS X's name refers to a Roman numeral. It is therefore pronounced "ten" in this context. However, it is commonly pronounced like the letter "X"; the first version of Mac OS X, Mac OS X Server 1.0, was a transitional product, featuring an interface resembling the classic Mac OS, though it was not compatible with software designed for the older system.
Consumer releases of Mac OS X included more backward compatibility. Mac OS applications could be rewritten to run natively via the Carbon API; the consumer version of Mac OS X was launched in 2001 with Mac OS X 10.0. Reviews were variable, with extensive praise for its sophisticated, glossy Aqua interface but criticizing it for sluggish performance. With Apple's popularity at a low, the makers of several classic Mac applications such as FrameMaker and PageMaker declined to develop new versions of their software for Mac OS X. Ars Technica columnist John Siracusa, who reviewed every major OS X release up to 10.10, described the early releases in retrospect as'dog-slow, feature poor' and Aqua as'unbearably slow and a huge resource hog'. Apple developed several new releases of Mac OS X. Siracusa's review of version 10.3, noted "It's strange to have gone from years of uncertainty and vaporware to a steady annual supply of major new operating system releases." Version 10.4, Tiger shocked executives at Microsoft by offering a number of features, such as fast file s
History of iTunes
The history of iTunes begins in 2001 and continues to the present. Conceived as a simple music player, over time iTunes developed into a sophisticated multimedia content manager, hardware synchronization manager and e-commerce platform; the current version of iTunes enables users to manage media content, create playlists, synchronize media content with handheld devices including the iPod, iPhone, iPad, re-image and update handheld devices, stream Internet radio and purchase music, television shows and applications via the iTunes Store. Apple based the initial release of iTunes on SoundJam MP, a program developed by Bill Kincaid and released by Casady & Greene in 1999. Apple purchased the program from Casady & Greene in 2000. At the time of the purchase, Jeff Robbin and Dave Heller left Casady & Greene to continue development of the program as Apple employees. At Apple, the developers simplified SoundJam's user interface, added the ability to burn CDs, removed the program's recording feature and skin support.
Apple released version 1.0 of the program under a new name, "iTunes", on January 9, 2001, at Macworld San Francisco. Macintosh users began poking through iTunes's resource fork, where they discovered numerous strings and other resources that indicated that iTunes was a re-engineered Sound Jam MP. Casady & Greene ceased distribution of SoundJam MP on June 2001 at the request of the developers. A Mac OS 9-only application, iTunes began to support Mac OS X with the release of version 1.1 in March 2001. Release 2.0 added support for the iPod. Version 3 added smart playlists and a ratings system. In April 2003, version 4.0 introduced the iTunes Store. Introduced at Macworld 2005 with the new iPod Shuffle, Version 4.7.1 introduced the ability to convert higher-bitrate songs to 128kbit/s AAC automatically, as these devices did not natively support audio encoded in AIFF or Apple Lossless formats improving the value proposition of the Shuffle's limited flash-only storage. Version 7.0 introduced gapless playback and Cover Flow in September 2006.
In March 2007, iTunes 7.1 added support for Windows Vista, 7.3.2 was the last Windows 2000 version.iTunes lacked support for 64-bit versions of Windows until the 7.6 update on January 16, 2008. ITunes is supported under any 64-bit version of Windows, although the iTunes executable was still 32-bit until version 12.1. The 64-bit versions of Windows XP and Windows Server 2003 are not supported by Apple, but a workaround has been devised for both operating systems. Version 8.0 added Genius playlists, grid view, a new default visualizer.iTunes 9 added "Home Share" enabling automatic updating of purchased items across other computers on the same subnet and offers a new iTunes Store UI. Genius Mixes were added, as well as improved App synchronization abilities, extending the iPod Shuffle 128 kbit/s down-convert feature to all of Apple's AAC-capable devices, it adds iTunes LPs to the store, which gives additional media with an album. Apple added iTunes Extras as well to the store, which adds content reserved for films on DVD and Blu-ray discs.
The new user interface includes a refreshed grid view, which replaces Cover Flow as the default layout method. With this change, Cover Flow is no longer available within the application. With the release of this software, the iTunes Store was redesigned to remain consistent with the new interface, the stores available on iOS devices; the social element Ping was removed and replaced by increased Twitter and Facebook integration. Other minor changes included disabling the sidebar by default, altering the icon to match that of the Mac App Store better. On October 16, 2014, Apple released iTunes 12, with a redesigned icon and interface, inspired by OS X Yosemite. With iTunes 12.1 and there is a new widget for notification center in OS X Yosemite, which allows the user to see what's playing, skip ahead, buy songs from iTunes Radio, right from notification center. It improves performance when syncing to an iOS device. ITunes has been credited with accelerating shifts within the music industry; the pricing structure of iTunes encouraged the sale of single songs, allowing users to abandon the purchase of more expensive albums.
This hastened the end of the Album Era in popular music. On April 26, 2018, Apple released iTunes 12 for Windows 10 via the Windows Store; the Universal Windows Platform app retains all features available in the desktop version, but will be updated and available through the Windows Store. ITunes Store requires at least versio
Apple Inc. is an American multinational technology company headquartered in Cupertino, that designs and sells consumer electronics, computer software, online services. It is considered one of the Big Four of technology along with Amazon and Facebook; the company's hardware products include the iPhone smartphone, the iPad tablet computer, the Mac personal computer, the iPod portable media player, the Apple Watch smartwatch, the Apple TV digital media player, the HomePod smart speaker. Apple's software includes the macOS and iOS operating systems, the iTunes media player, the Safari web browser, the iLife and iWork creativity and productivity suites, as well as professional applications like Final Cut Pro, Logic Pro, Xcode, its online services include the iTunes Store, the iOS App Store, Mac App Store, Apple Music, Apple TV+, iMessage, iCloud. Other services include Apple Store, Genius Bar, AppleCare, Apple Pay, Apple Pay Cash, Apple Card. Apple was founded by Steve Jobs, Steve Wozniak, Ronald Wayne in April 1976 to develop and sell Wozniak's Apple I personal computer, though Wayne sold his share back within 12 days.
It was incorporated as Apple Computer, Inc. in January 1977, sales of its computers, including the Apple II, grew quickly. Within a few years and Wozniak had hired a staff of computer designers and had a production line. Apple went public in 1980 to instant financial success. Over the next few years, Apple shipped new computers featuring innovative graphical user interfaces, such as the original Macintosh in 1984, Apple's marketing advertisements for its products received widespread critical acclaim. However, the high price of its products and limited application library caused problems, as did power struggles between executives. In 1985, Wozniak departed Apple amicably and remained an honorary employee, while Jobs and others resigned to found NeXT; as the market for personal computers expanded and evolved through the 1990s, Apple lost market share to the lower-priced duopoly of Microsoft Windows on Intel PC clones. The board recruited CEO Gil Amelio to what would be a 500-day charge for him to rehabilitate the financially troubled company—reshaping it with layoffs, executive restructuring, product focus.
In 1997, he led Apple to buy NeXT, solving the failed operating system strategy and bringing Jobs back. Jobs pensively regained leadership status, becoming CEO in 2000. Apple swiftly returned to profitability under the revitalizing Think different campaign, as he rebuilt Apple's status by launching the iMac in 1998, opening the retail chain of Apple Stores in 2001, acquiring numerous companies to broaden the software portfolio. In January 2007, Jobs renamed the company Apple Inc. reflecting its shifted focus toward consumer electronics, launched the iPhone to great critical acclaim and financial success. In August 2011, Jobs resigned as CEO due to health complications, Tim Cook became the new CEO. Two months Jobs died, marking the end of an era for the company. Apple is well known for its size and revenues, its worldwide annual revenue totaled $265 billion for the 2018 fiscal year. Apple is the world's largest information technology company by revenue and the world's third-largest mobile phone manufacturer after Samsung and Huawei.
In August 2018, Apple became the first public U. S. company to be valued at over $1 trillion. The company employs 123,000 full-time employees and maintains 504 retail stores in 24 countries as of 2018, it operates the iTunes Store, the world's largest music retailer. As of January 2018, more than 1.3 billion Apple products are in use worldwide. The company has a high level of brand loyalty and is ranked as the world's most valuable brand. However, Apple receives significant criticism regarding the labor practices of its contractors, its environmental practices and unethical business practices, including anti-competitive behavior, as well as the origins of source materials. Apple Computer Company was founded on April 1, 1976, by Steve Jobs, Steve Wozniak, Ronald Wayne; the company's first product is the Apple I, a computer designed and hand-built by Wozniak, first shown to the public at the Homebrew Computer Club. Apple I was sold as a motherboard —a base kit concept which would now not be marketed as a complete personal computer.
The Apple I went on sale in July 1976 and was market-priced at $666.66. Apple Computer, Inc. was incorporated on January 3, 1977, without Wayne, who had left and sold his share of the company back to Jobs and Wozniak for $800 only twelve days after having co-founded Apple. Multimillionaire Mike Markkula provided essential business expertise and funding of $250,000 during the incorporation of Apple. During the first five years of operations revenues grew exponentially, doubling about every four months. Between September 1977 and September 1980, yearly sales grew from $775,000 to $118 million, an average annual growth rate of 533%; the Apple II invented by Wozniak, was introduced on April 16, 1977, at the first West Coast Computer Faire. It differs from its major rivals, the TRS-80 and Commodore PET, because of its character cell-based color graphics and open architecture. While early Apple II models use ordinary cassette tapes as storage devices, they were superseded by the introduction of a 5 1⁄4-inch floppy disk drive and interface called the Disk II.
The Apple II was chosen to be the desktop platform for the first "killer app" of the business world: VisiCalc, a spreadsheet program. VisiCalc created a business market for the Apple II and gave home users an additional reason to buy an Apple II: compatibility with the office. Before VisiCalc, Apple had been a distant third place c
Apple Photos is a photo management and editing application developed by Apple. It was released as a bundled app in iOS 8 on September 17, 2014—replacing the Camera Roll—and released as a bundled app to OS X Yosemite users in the 10.10.3 update on April 8, 2015. It was released for tvOS 10 on September 13, 2016. In June 2014, Apple announced its plan to discontinue the applications iPhoto and Aperture, to be replaced by a new application, Photos, at some point in 2015. Photos is included with OS X Yosemite 10.10.3, released as a free update to users on April 8, 2015. On September 13, 2016, the app was included in tvOS 10. Photos is intended to be less complex than Aperture. Photos are organized by the "moment", a combination of time and location metadata attached to the photo. Photos tucks complex editing tools into several simple controls by default. Photos is designed to "reward curiosity and additional clicks with more granular manipulation capabilities". A one-click auto-enhance button is available.
ICloud Photo Library is integrated into the program, keeping photos and videos in sync with various Apple devices designated by the user, including edits and album structures. Storage starts at a complimentary 5 GB and can be bought in a number of tiers up to 2 TB. While iCloud integration is still optional, it is much more central to Photos as compared to iPhoto. Like its predecessors, Photos included a number of options for professional printing of photos, which could optionally be turned into books or calendars and mailed to an address. With Photos, Apple added new types of prints, including square sizes and the ability to print panoramas. In July 2018, Apple announced, via a pop-up message in Photos, that they would be discontinuing these services, adding that users should submit any final orders by September 30, 2018. ICloud Photo Sharing allows sharing photos with others. Others can view, like or comment existing shared photos or contribute new photos to the shared album. Other ways of sharing includes e-mail, social platform that integrates through iOS Extensions, or Apple's peer-to-peer AirDrop technology.
Critics have noted the loss of functionality in Photos as compared to its predecessors. In particular, photos can no longer be ordered as events but are either automatically ordered chronologically into moments or must be put into albums; as of OS X El Capitan, only the latest version of iPhoto still operates. Darktable gThumb Official website
Macintosh operating systems
The family of Macintosh operating systems developed by Apple Inc. includes the graphical user interface-based operating systems it has designed for use with its Macintosh series of personal computers since 1984, as well as the related system software it once created for compatible third-party systems. In 1984, Apple debuted the operating system, now known as the "Classic" Mac OS with its release of the original Macintosh System Software; the system, rebranded "Mac OS" in 1996, was preinstalled on every Macintosh until 2002 and offered on Macintosh clones for a short time in the 1990s. Noted for its ease of use, it was criticized for its lack of modern technologies compared to its competitors; the current Mac operating system is macOS named "Mac OS X" until 2012 and "OS X" until 2016. Developed between 1997 and 2001 after Apple's purchase of NeXT, Mac OS X brought an new architecture based on NeXTSTEP, a Unix system, that eliminated many of the technical challenges that the classic Mac OS faced.
The current macOS is updated annually. It is the basis of Apple's current system software for its other devices, iOS, watchOS, tvOS. Prior to the introduction of Mac OS X, Apple experimented with several other concepts, releasing different products designed to bring the Macintosh interface or applications to Unix-like systems or vice versa, A/UX, MAE, MkLinux. Apple's effort to expand upon and develop a replacement for its classic Mac OS in the 1990s led to a few cancelled projects, code named Star Trek and Copland. Although they have different architectures, the Macintosh operating systems share a common set of GUI principles, including a menu bar across the top of the screen; the "classic" Mac OS is the original Macintosh operating system, introduced in 1984 alongside the first Macintosh and remained in primary use on Macs through 2001. Apple released the original Macintosh on January 24, 1984, it was named "System Software", or "System". Classic Mac OS is characterized by its monolithic design.
Initial versions of the System Software run one application at a time. System 5 introduced cooperative multitasking. System 7 supports virtual memory, allowing larger programs. Updates to the System 7 enable the transition to the PowerPC architecture; the system was considered user-friendly, but its architectural limitations are notably criticed, such as limited memory management, lack of protected memory and access controls, susceptibility to conflicts among extensions. Nine major versions of the classic Mac OS were released; the name "Classic" that now signifies the system as a whole is a reference to a compatibility layer that helped ease the transition to Mac OS X. Macintosh System Software – "System 1", released in 1984 System Software 2, 3, 4 – released between 1985 and 1987 System Software 5 – released in 1987 System Software 6 – released in 1988 System 7 / Mac OS 7.6 – released in 1991 Mac OS 8 – released in 1997 Mac OS 9 – final major version, released in 1999 macOS is the current Mac operating system that succeeded the classic Mac OS in 2001.
Although the system was marketed as "version 10" of Mac OS, it has a history, independent of the classic Mac OS. It is a Unix-based operating system built on NeXTSTEP and other technology developed at NeXT from the late 1980s until early 1997, when Apple purchased the company and its CEO Steve Jobs returned to Apple. Precursors to the original release of Mac OS X include OpenStep, Apple's Rhapsody project, the Mac OS X Public Beta. MacOS makes use of the BSD codebase and the XNU kernel, its core set of components is based upon Apple's open source Darwin operating system; the first desktop version of the system was released on March 24, 2001, supporting the Aqua user interface. Since several more versions adding newer features and technologies have been released. Since 2011, new releases have been offered on an annual basis. Mac OS X 10.0 – code name "Cheetah", released to end users on Saturday, March 24, 2001 Mac OS X 10.1 – code name "Puma", released to end users on Tuesday, September 25, 2001 Mac OS X 10.2 – marketed as "Jaguar", released to end users on Friday, August 23, 2002 Mac OS X Panther – version 10.3, released to end users on Friday, October 24, 2003 Mac OS X Tiger – version 10.4, released to end users on Friday, April 29, 2005 Mac OS X Leopard – version 10.5, released to end users on Friday, October 26, 2007 Mac OS X Snow Leopard – version 10.6, publicly unveiled on Monday, June 8, 2009 Mac OS X Lion – version 10.7, released to end users on Wednesday, July 20, 2011 OS X Mountain Lion – version 10.8, released to end users on Wednesday, July 25, 2012 OS X Mavericks – version 10.9, released to end users on Tuesday, October 22, 2013 OS X Yosemite – version 10.10, released to end users on Thursday, October 16, 2014 OS X El Capitan – version 10.11, released to end users on Wednesday, September 30, 2015 macOS Sierra – version 10.12, released to end users on Tuesday, September 20, 2016 macOS High Sierra – version 10.13, released to end users on Monday, September 25, 2017 macOS Mojave – version 10.14, released to end users on Monday, September 24, 2018 An early server computing version
OS X El Capitan
OS X El Capitan is the twelfth major release of OS X, Apple Inc.'s desktop and server operating system for Macintosh computers. It is the successor to OS X Yosemite and focuses on performance and security. Following the Northern California landmark-based naming scheme introduced with OS X Mavericks, El Capitan was named after a rock formation in Yosemite National Park, signifying its goal to be a refined version of Yosemite. El Capitan is the final version to be released under the name OS X. El Capitan received far superior reviews; the first beta of OS X El Capitan was released to developers shortly following the 2015 WWDC keynote on June 8, 2015. The first public beta was made available on July 9, 2015. There were multiple betas released after the keynote. OS X El Capitan was released to end users on September 30, 2015, as a free upgrade through the Mac App Store. All Macintosh computers that can run Mountain Lion, Mavericks, or Yosemite can run El Capitan, although not all of its features will work on older computers.
For example, Apple notes that the newly available Metal API is available on "all Macs since 2012". These computers can run El Capitan, provided they have at least 2GB of RAM: MacBook: Late 2008 or newer MacBook Air: Late 2008 or newer MacBook Pro: Mid 2007 or newer Mac Mini: Early 2009 or newer iMac: Mid 2007 or newer Mac Pro: Early 2008 or newer Xserve: Early 2009Of these computers, the following models were equipped with 1GB RAM as the standard option on the base model when they were shipped originally, they can only run OS X El Capitan if they have at least 2GB of RAM. iMac: Mid 2007 - Early 2008 Mac Mini: Early 2009The following computers support features such as Handoff, Instant Hotspot, AirDrop between Mac computers and iOS devices, as well as the new Metal API: iMac: Late 2012 or newer MacBook: Early 2015 or newer MacBook Air: Mid 2012 or newer MacBook Pro: Mid 2012 or newer Mac Mini: Late 2012 or newer Mac Pro: Late 2013The upgrade varies in size depending upon which Apple Mac computer it is being installed on, in most scenarios it will require about 6 GB of disk space.
OS X El Capitan includes features to improve the security, performance and usability of OS X. Compared to OS X Yosemite, Apple says that opening PDFs is four times faster, app switching and viewing messages in Mail is twice as fast and launching apps is 40% faster; the maximum amount of memory that could be allocated to the graphics processor has been increased from 1024 MB to 1536 MB on Macs with an Intel HD 4000 GPU. OS X El Capitan supports Metal, Apple's graphics API introduced in iOS 8 to speed up performance in games and professional applications. Apple's typeface San Francisco replaces Helvetica Neue as the system typeface. OS X El Capitan adopts LibreSSL in replacement of OpenSSL used in previous versions. OS X El Capitan introduces new window management features such as creating a full-screen split view by pressing the green button on left upper corner of the window or Control+Cmd+F keyboard shortcut snapping any supported other window to that full screen application; this feature is similar to, although less extensive than, the snap-assist feature in Windows 7 and several Linux desktop environments, such as GNOME.
OS X El Capitan improves Mission Control to incorporate this feature across multiple spaces. It enables users to spot the pointer more by enlarging it by shaking the mouse or swiping a finger back and forth on the trackpad. OS X El Capitan adds multi-touch gestures to applications like Mail and Messages that allow a user to delete or mark emails or conversations by swiping a finger on a multi-touch device, such as a trackpad. OS X analyzes the contents of individual emails in Mail and uses the gathered information in other applications, such as Calendar. For example, an invitation in Mail can automatically be added as a Calendar event. Apple Maps in El Capitan shows public transit information similar to Maps in iOS 9; this feature was limited to a handful of cities upon launch: Baltimore, Chicago, Los Angeles, Mexico City, New York City, Philadelphia, San Francisco, Shanghai and Washington D. C; the Notes application receives an overhaul, similar to Notes in iOS 9. Both applications have more powerful text-processing capabilities, such as to-do lists, inline webpage previews and videos, digital sketches, map locations and other documents and media types.
The app can now be moved across the screen. Photos introduced editing extensions which allows Photos to use editing to
The Finder is the default file manager and graphical user interface shell used on all Macintosh operating systems. Described in its "About" window as "The Macintosh Desktop Experience", it is responsible for the launching of other applications, for the overall user management of files and network volumes, it was introduced with the first Macintosh computer, exists as part of GS/OS on the Apple IIGS. It was rewritten with the release of Mac OS X in 2001. In a tradition dating back to the Classic Mac OS of the 1980s and 1990s, the Finder icon is the smiling screen of a computer, known as the Happy Mac logo; the Finder uses a view of the file system, rendered using a desktop metaphor. It uses a similar interface to Apple's Safari browser, where the user can click on a folder to move to it and move between locations using "back" and "forward" arrow buttons. Like Safari, the Finder uses tabs to allow the user to view multiple folders. There is a "favorites" sidebar of used and important folders on the left of the Finder window.
The modern Finder uses macOS graphics APIs to display previews of a range of files, such as images, applications and PDF files. The Quick Look feature allows users to examine documents and images in more detail from the finder by pressing the space bar without opening them in a separate application; the user can choose how to view files, with options such as large icons showing previews of files, a list with details such as date of last creation or modification, a Gallery View, a "column view" influenced by macOS's direct ancestor NeXTSTEP. The modern Finder displays some aspects of the file system outside its windows. Mounted external volumes and disk image files can be displayed on the desktop. There is a trash can on the Dock in macOS, to which files can be dragged to mark them for deletion, to which drives can be dragged for ejection; when a volume icon is being dragged, the Trash icon in the Dock changes to an eject icon in order to indicate this functionality. Finder can record files to optical media on the sidebar.
From Yosemite onwards, the Finder contains official support for extensions, allowing synchronization and cloud storage applications such as Dropbox to display sync status labels inside the Finder display. The classic Mac OS Finder uses a spatial metaphor quite different to the more browser-like approach of the modern macOS Finder. In the classic Finder, opening a new folder opens the location in a new window: finder windows are'locked' so that they would only display the contents of one folder, it allows extensive customization, with the user being able to give folders custom icons matching their content. This approach emphasizes the different locations of files within the operating system, but navigating to a folder nested inside multiple other folders fills the desktop with a large number of windows that the user may not wish to have open; these must be closed individually. Holding down the option key when opening a folder would close its parent, but this trick was not discoverable and remained under the purview of power users.
Stewart Alsop II in 1988 said "It is testimony to either the luck or vision of the original designers" of Finder that "the interface has been able to survive tremendous evolution without much essential damage" from 1984. He praised its spatial file manager as "probably a more complete definition of a PC-based universe than any" competitor, with users able to seamlessly use floppies and remote hard disks, large and small file servers. Alsop said that if Apple had stolen Xerox's technology for Finder, it was now different. While criticizing the lack of a right mouse button and Multifinder's clumsiness, he concluded that "Apple remains the king of user interfaces. Finder is the only interface with 1.5 million people sitting in front of it daily. Apple is spending tremendous amounts of money on both development and basic research to remain the leader". Introducing Mac OS X in 2000, Steve Jobs criticized the original Finder, saying that it "generates a ton of windows, you get to be the janitor."Ars Technica columnist John Siracusa has been a long-standing defender of the spatial interface of the classic Mac OS Finder, a critic of the new design.
Daring Fireball blog author John Gruber has voiced similar criticisms. In a 2005 interview he said that the Finder in version 10.3 of Mac OS X had become "worse than in 10.0" and that "the fundamental problem with the OS X Finder is that it's trying to support two opposing paradigms at once – the browser metaphor... and the spatial metaphor from the original Mac Finder... and it ends up doing neither one well." Reviewing the same version of Mac OS X, Siracusa comments that the Finder "provides the same self-destructive combination of spatial and browser-style features as all of its Mac OS X predecessors". Third-party macOS software developers offer Finder replacements that run as stand-alone applications, such as ForkLift, Path Finder and XtraFinder; these replacements are shareware or freeware and aim to include and supersede the functionality of the Finder. After Mac OS X 10.4 Tiger the UNIX command line file management tools understand resource forks and can be used for management of Mac files.
There are minor differences between Finder versions and Classic OS to System 7. From System 6 onward, the version numbers are unified. Since the introduction of Mac OS X, the largest rewrite of the Finder was with the 2009 release of Mac OS X 10.6, into the Cocoa API, though little change was visible to the user. Spatial file manager Miller columns List of file managers