OS X Yosemite

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OS X 10.10 Yosemite
A version of the OS X operating system
OS X Yosemite Desktop.png
The desktop of OS X Yosemite
Developer Apple Inc.
Source model Closed source (with open source components)
Released to
October 16, 2014
Latest release 10.10.5 (Build 14F27)[1] / August 13, 2015; 3 months ago (2015-08-13)
Update method Mac App Store
Platforms x86-64
Kernel type Hybrid (XNU)
License APSL and Apple EULA
Preceded by OS X 10.9 Mavericks
Succeeded by OS X 10.11 El Capitan
Official website OS X Yosemite at the Wayback Machine (archived August 28, 2015)
Support status
Security updates and printer drivers only

OS X Yosemite (/jˈsɛmɨt/ yoh-SEM-it-ee) (version 10.10) is the eleventh major release of OS X, Apple Inc.'s desktop and server operating system for Macintosh computers.

OS X Yosemite was announced and released to developers on June 2, 2014 at WWDC 2014 and released to public beta testers on July 24, 2014. Yosemite was released to consumers on October 16, 2014.[2] Following the California landmark-based naming scheme introduced with OS X Mavericks, Yosemite is named after the national park.



Yosemite introduced a major overhaul of OS X's user interface. Its graphics replaced skeuomorphism with flat graphic design and blurred translucency effects, following the aesthetic introduced with iOS 7. Some icons have been changed to correspond with those of iOS 7 and iOS 8. Yosemite maintains the OS X desktop metaphor.[3]

Other design changes include new icons, light and dark color schemes, and the replacement of Lucida Grande with Helvetica Neue as the default system typeface.[4][5][6] The Dock is now a 2D translucent rectangle instead of a skeuomorphic glass shelf, reminiscent of the Dock design used in early versions of OS X through Tiger and in iOS since iOS 7.


Many of Yosemite's new features focus on the theme of continuity, increasing its integration with other Apple services and platforms such as iOS and iCloud.[7] The Handoff functionality allows the operating system to integrate with iOS 8 devices over Bluetooth LE and Wi-Fi; users can place and answer phone calls using their iPhone as a conduit, send and receive text messages, activate personal hotspots, or load items being worked on in a mobile app (such as Mail drafts or Numbers spreadsheets) directly into their desktop equivalent.[7] In October 2015, AT&T released NumberSync, a comparable feature that links all of a user’s devices to a single telephone number, free of charge.[8]

Notification Center[edit]

Notification Center features a new "Today" view, similar to that in iOS. The Today view can display information and updates from various sources, along with widgets.[4][5] The widgets in the Today view are similar to those of iOS 8.


As of OS X 10.10.3, Photos replaces iPhoto and Aperture. It uses iCloud Photo Library to upload all the user's photos across their devices.


Spotlight is a more prominent part of the operating system; it now displays its search box in the center of the screen and can include results from online sources, including Bing, Maps, and Wikipedia.[4] Stock applications such as Safari and Mail have been updated.[9] In particular, many security features have been added to Safari, such as a custom history clearing option that lets users clear history, cookies, and other data from the previous hour, day, or two days. In addition, Apple added DuckDuckGo to its search offerings, a non-tracking search engine that doesn’t store users’ data.[10]

The green "zoom" button on windows now has a different function in applications that support full screen mode. Instead of simply enlarging the window, the button now enters full screen mode, eliminating the full screen button at the top right corner of windows that has been present since Mac OS X Lion. However, holding the Option key (⌥) while clicking the zoom button or double-clicking on the window chrome continues to invoke the original behavior.[11]:123–124

JavaScript for Automation (JXA) is the new system-wide support for scripting with JavaScript, built upon JavaScriptCore and the Open Scripting Architecture.[12] It features an Objective-C bridge which enables entire Cocoa applications to be programmed in JavaScript.[13]

Beta testing[edit]

Apple initiated a new public beta program for OS X, a practice not seen with its operating systems since 2000's US$29.95 Mac OS X Public Beta, which had preceded the release of Mac OS X v10.0. Yosemite is part of the OS X Beta Seed Program, a public program that allows the first 1 million[14] users to download and test the Yosemite beta at no charge. Beta testers are required to acknowledge the potential risks involved with prerelease software, and sign a non-disclosure agreement (NDA).[15] The program began releasing Public Betas on July 24, 2014.[16] Six public betas of Yosemite were released.


Version Build Date OS name Notes Standalone download
10.10 14A389 October 16, 2014 Darwin 14.0 Original Mac App Store release N/A
10.10.1 14B25 November 17, 2014 About the OS X Yosemite v10.10.1 Update OS X Yosemite 10.10.1 Individual update
10.10.2 14C109
January 27, 2015 Darwin 14.1 About the OS X Yosemite v10.10.2 Update OS X Yosemite 10.10.2 Individual update

OS X Yosemite 10.10.2 Combo update

14C1510 (Security Update 2015-002) March 9, 2015 Security Update 2015-002 Yosemite
14C1514 (Security Update 2015-003) March 19, 2015 Security Update 2015-003 Yosemite
14C2043 (Pre Security Update 2015-003)
March 10, 2015 Shipped with Early 2015 MacBook Air - Forked build. N/A
14C2513 (Security Update 2015-003)
March 20, 2015
10.10.3 14D131 April 8, 2015 Darwin 14.3 About the OS X Yosemite v10.10.3 Update

This release unified the previously forked build for the early 2015 MacBook Air

OS X Yosemite 10.10.3 Individual update

OS X Yosemite 10.10.3 Combo update

14D136 (Supplemental Update) April 16, 2015 Fixes issue with video driver issue that may prevent Mac from starting up when running certain apps that capture video. OS X Yosemite 10.10.3 Supplemental Update 1.0
10.10.4 14E46
June 30, 2015 Darwin 14.4 About the OS X Yosemite v10.10.4 Update OS X Yosemite 10.10.4 Individual update

OS X Yosemite 10.10.4 Combo update

10.10.5 14F27
August 13, 2015 Darwin 14.5 About the OS X Yosemite v10.10.5 Update OS X Yosemite 10.10.5 Individual update

OS X Yosemite 10.10.5 Combo update

System requirements[edit]

All Macintosh products capable of running OS X Mountain Lion (v10.8.x) are able to run Yosemite as they have the same requirements.[17] However, in order to take full advantage of the Handoff feature, additional minimum system requirements include a Mac with Bluetooth LE (Bluetooth 4.0). As with Mavericks and Mountain Lion, 2 GB of RAM, 8 GB of available storage, and OS X 10.6.8 (Snow Leopard) or later are required.

These are the models that are compatible with OS X Yosemite (with exceptions):

  • iMac (Mid 2007 or later)
  • MacBook (Aluminum Late 2008 and Early 2009 or later)
  • MacBook Pro (13-inch, Mid-2009 or later; 15-inch, Mid/Late 2007 or later; 17-inch, Late 2007 or later)
  • MacBook Air (Late 2008 or later)
  • Mac Mini (Early 2009 or later)
  • Mac Pro (Early 2008 or later)
  • Xserve (Early 2009)

These are the models that support new features such as Handoff, Instant Hotspot as well as AirDrop between Mac computers and iOS devices:[18]


On release, Yosemite received generally positive reviews, with users praising the simplified user interface. Programmer John Siracusa, who had reviewed every OS release, wrote for Ars Technica that "Yosemite is an aesthetic one-way valve..switching back to Mavericks after a week or two in Yosemite is like returning to iOS 6. Everything looks embarrassingly chunky, glossy, and gaudy."[19] Macworld's review generally praised Yosemite for its design, but noted that it had found WiFi network issues and that Continuity had proved unreliable.[20]


As Yosemite entered general release and stability/performance problems on the initial release did not seem to have been resolved, an ongoing discussion began to develop among prominent developers and webloggers about Apple software quality and stability. (This issue may not have been noticed earlier since many initial-release reviewers review from betas, which are expected to contain some bugs, and therefore tend to focus on features rather than stability unless stability is still completely unacceptable at release date; wider use may also highlight some more obscure bugs.)

Yosemite faced particular problems with network stability and the discoveryd DNS system, which led Apple to revert to the mDNSResponder system (used in Mavericks) in 10.10.4.[21] Another notable bug experienced on Yosemite was the 'unicode of death' problem, following a similar bug in 2013, in which a meaningless Arabic text string could crash applications using the system text-display APIs.[22] Some users that upgraded to Yosemite complained that the Finder fails to show the contents of folders.[23]

Software developers and users have argued that Apple's yearly release schedule and development practices have compromised stability, and meant that no version of OS X is truly recommendable for users requiring reliability above new user interface design and features.[24][25][26][27][28][29]

Spotlight on Yosemite by default reports the user's current location (at the city level) and all their search queries to Apple and third parties.[30][31][32][33] Reporting by Spotlight can be disabled by the user, although, even if this is done, the Safari web browser will continue to send search terms to Apple unless the function is separately disabled.


  1. ^ "Mac App Store - OS X Yosemite". Mac App Store. Retrieved August 13, 2015. 
  2. ^ "Apple - OS X Yosemite - Overview". Apple Inc. (US). OS X Yosemite. Coming this fall. 
  3. ^ "OS X Yosemite - Design". Apple Inc. 
  4. ^ a b c "OS X Yosemite: Apple's latest desktop OS works even better with your iPhone". Engadget. Retrieved June 3, 2014. 
  5. ^ a b "OS X Yosemite unveiled at WWDC, features big UI overhaul". Ars Technica. Retrieved June 3, 2014. 
  6. ^ "Apple Changes OS X's Main Font For The First Time Ever". Fast Co Design. Archived from the original on October 16, 2014. Retrieved June 3, 2014. 
  7. ^ a b "OS X Yosemite – Mac + iOS Continuity". Apple. Retrieved November 16, 2014. 
  8. ^ "AT&T announces NumberSync, a phone number-based version of Apple’s Continuity". AppleInsider. 2015-10-14. Archived from the original on 2015-10-15. While Apple’s Continuity feature allows users to place calls and texts within its own ecosystem of products, AT&T plans to bring those same capabilities to a range of LTE‑capable devices sharing the same phone number, regardless of platform, thanks to a new service called NumberSync. . . . NumberSync will work with tablets and wearable devices with integrated cellular radios. It will be offered at no extra charge beyond the $10‑per‑device fee AT&T charges per month for a connected tablet or smartwatch. 
  9. ^ "OS X Yosemite revealed: Translucent windows, cross-platform Continuity, and HTML 5 DRM come to the Mac". ExtremeTech. Retrieved June 3, 2014. 
  10. ^ John Patrick Pullen (October 21, 2014). "These Are the 5 Coolest Features of OS X Yosemite". Time Inc. 
  11. ^ "Adapting your app to the new UI of OS X Yosemite" (PDF). Apple Inc. June 3, 2014. Retrieved August 10, 2014. 
  12. ^ "JavaScript for Automation". MacStories. Retrieved August 31, 2014. 
  13. ^ "JavaScript for Automation Release Notes". Apple, Inc. Retrieved August 31, 2014. 
  14. ^ "OS X Beta Program". Apple Inc. Retrieved July 7, 2014. 
  15. ^ "OS X Beta Program Frequently Asked Questions". Apple Inc. Retrieved July 7, 2014. 
  16. ^ "Apple to release first public beta of OS X Yosemite on Thursday". AppleInsider. AppleInsider. July 23, 2014. Retrieved July 24, 2014. 
  17. ^ "PSA: The iDevices and Macs that will support iOS 8 and OS X 10.10". Ars Technica. Retrieved June 3, 2014. 
  18. ^ "OS X Yosemite: supported devices for Handoff, Instant Hotspot, Phone Calling, SMS, and AirDrop". Apple. Retrieved December 6, 2014. 
  19. ^ Siracusa, John. "Yosemite review". Ars Technica. 
  20. ^ Haslam, Karen. "Yosemite review". Macworld. Retrieved 15 August 2015. 
  21. ^ "Latest OS X beta ditches buggy discoveryd DNS service, replaced with mDNSResponder". Apple Insider. Retrieved 15 August 2015. 
  22. ^ Thomson, Iain. "That EVIL TEXT that will CRASH your iPhone: We pop the hood". The Register. Retrieved 15 August 2015. 
  23. ^ Gewirtz, David (December 2, 2014). "When Yosemite went wonky: Fixing an OS X systems failure". ZD Net. Retrieved March 15, 2015. 
  24. ^ Arment, Marco (January 4, 2015). "Apple has lost the functional high ground". marco.org. Retrieved January 20, 2015. 
  25. ^ Hockenberry, Craig (January 6, 2015). "Death by a thousand cuts". Furbo.org. Retrieved January 20, 2015. 
  26. ^ Jalkut, Daniel (January 5, 2015). "The functional high ground". bitsplitting.org. Retrieved January 20, 2015. 
  27. ^ Gruber, John (January 5, 2015). "Functional high ground". daringfireball.net. Retrieved January 20, 2015. 
  28. ^ Snell, Jason (January 5, 2015). "Apple and software quality". sixcolors.com. Retrieved January 20, 2015. 
  29. ^ English, Guy (January 5, 2015). "We Don’t Need". kickingbear.com. Retrieved January 20, 2015. 
  30. ^ "Fix Mac OS X Yosemite initiative". 
  31. ^ Soltani, Ashkan; Timberg, Craig (October 20, 2014). "Apple’s Mac computers can automatically collect your location information". Washington Post. Retrieved October 23, 2014. 
  32. ^ Fox-Brewster, Thomas (October 20, 2014). "Spotlight: Privacy Advocates Furious As Apple Feature Siphons Off Location Data of Yosemite And iOS 8 Users". Forbes. Retrieved October 23, 2014. 
  33. ^ Leyden, John (October 20, 2014). "FYI: OS X Yosemite's Spotlight tells Apple EVERYTHING you're looking for". The Register. Retrieved October 22, 2014. 

External links[edit]

Preceded by
OS X 10.9
OS X 10.10
Succeeded by
OS X 10.11