Mac OS X Lion

Mac OS X v10.7 "Lion"
Part of the Mac OS X family
Screenshot of Mac OS X Lion
Developer
Apple Inc.
Website Official website
Releases
Release date July 20, 2011; 7 months ago (2011-07-20) [info]
Current version 10.7.2 (11C74) (October 12, 2011; 4 months ago (2011-10-12)) [info]
Preview version 10.7.3 (11D36) (December 20, 2011; 2 months ago (2011-12-20)) [info]
Source model Closed source (with open source components)
License APSL and Apple EULA
Kernel type Hybrid
Update method Apple Software Update
Platform support x86-64
Preceded by Mac OS X v10.6 "Snow Leopard"
Support status
Supported

Mac OS X Lion[1] (version 10.7; marketed as OS X Lion)[2] is the eighth and current major release of Mac OS X, Apple's desktop and server operating system for Macintosh computers.

A preview of Lion was publicly unveiled at Apple's "Back to the Mac" event on October 20, 2010. It brings many developments made in Apple's iOS, such as an easily navigable display of installed applications, to the Mac, and includes support for the Mac App Store, as introduced in Mac OS X Snow Leopard version 10.6.6.[3][4] On February 24, 2011, the first developer's preview of Lion (11A390) was released to subscribers of Apple's developers program.[5] Other developer previews were subsequently released, with Lion Preview 4 (11A480b) being released at WWDC 2011.[6]

Lion achieved golden master status on July 1, 2011,[7] followed by its final release via the Mac App Store on July 20, 2011. Apple reported over 1 million Lion sales on the first day of its release.[8] As of October 2011, Mac OS X Lion has sold over 6 million copies worldwide.[9]

Contents

Release and distribution

On June 6, 2011, at the Apple Worldwide Developers Conference, it was announced that the official release for Lion would be in July 2011. The specific release date of July 20 was not confirmed until the day before, July 19, by Apple CFO, Peter Oppenheimer, as part of Apple's 2011 third-quarter earnings announcement.[10]

Apple did not initially announce any physical media distribution for Lion, such as a set of CD-ROMs or a DVD-ROM as used for past releases. Instead, the operating system was said to be available exclusively as a download from the Mac App Store for US$29.99.[11][12] The only prior version of OS X that supports the Mac App Store is Snow Leopard, which implied that any machines that support Lion currently running Tiger or Leopard would first have to be upgraded to Snow Leopard, as opposed to allowing a direct upgrade to Lion.

Apple later announced two alternative distribution mechanisms for the benefit of users without broadband Internet access: in-store downloads at retail Apple Stores, and a USB flash drive containing the OS, priced at US$69, available through the online Apple Store beginning in August.[13] It is not clear whether the USB distribution will support a direct upgrade to Lion from OS X versions prior to Snow Leopard. On August 4 2011, Apple started to take orders for Mac OS X Lion's USB installation flash drives for $69.99.[14]

The Server portion of Lion is available as a separate download from the Mac App Store for US$49.99, which is in addition to the purchase price of Lion itself.[15]

Hardware support

The first developer preview of Lion added TRIM support for SSDs shipped with Macs, which is also included in the latest version of Snow Leopard (10.6.8) shipping with current MacBook Pros before July 20, 2011. As of yet, there is no TRIM support for other SSDs.[16]

System requirements

New or changed features

Some new features were announced at the "Back to the Mac" keynote in October 2010, and the Apple website was updated in February 2011 with more details. Other features were announced at the WWDC 2011 keynote or on Apple's Mac OS X Lion Web site after the keynote. Apple states that there are over 250 new or changed features in Lion, including:

The complete list from Apple can be found on Apple's website.[59]

Server features

User interface changes

Dropped features

Reception

Reception for OS X Lion has generally been positive. In an extensive review of the operating system, Ars Technica recommended Lion.[61] They noted that it feels like it is the start of a new line of operating systems that will continue to be influenced by Apple's iOS platform.[61] The review also compared the introduction of Lion, along with its new conventions that change traditional ways of computing, to the original Mac OS X and when it replaced the classic Mac OS.[61] Macworld called Lion a "radical revision", praising the changes made to the operating system to be more user friendly to new Mac users that are familiar with the iOS interface, while criticizing the limited utility of the interface. Ultimately, the magazine considered Lion an operating system worth getting, giving it 4.5 out of 5 stars.[77] guardian.co.uk called Lion a substantial improvement from its predecessors, and considered it a "steal" given its price.[78]

On the other hand, Gizmodo stated that the new interface "feels like a failure" and concluded by saying that "it doesn't feel like a must-have upgrade".[79] More recently, many portable Mac users have also been put off by system overheating and the lower battery life they have experienced after upgrading to Lion; [80] At least a dozen Apple Support Forums address these issues as of January 2012; one of the more active Forums, cited in the footnotes below, has over 120 pages of comments. MacBook Pro users have claimed battery life as low as 2.5 hours after the upgrade to Lion.[80] A temporary fix had been suggested by resetting the System Management Controller (SMC) and switching graphics manually, but this has apparently has not rectified the problem for most of the users in the relevant Apple Discussion Forums.[81] Apple has now unofficially promised to solve the battery problem[82], and has reportedly reached out to MacBook Pro users at the Official Apple Discussion Forums[80]. However, Apple has not officially acknowledged the situation and no solution has been promised.

Due to Lion's enhanced security features, including application sandboxing, Dino Dai Zovi, principal of security consultancy Trail of Bits and the coauthor (with Charles Miller) of The Mac Hacker's Handbook, characterized Lion's security as "a significant improvement, and the best way that I've described the level of security in Lion is that it's Windows 7, plus, plus. I generally tell Mac users that if they care about security, they should upgrade to Lion sooner rather than later, and the same goes for Windows users, too."[83]

Software incompatibilities

Release history

Version Build[89] Date OS name Notes Standalone download
10.7 11A511 July 20, 2011 Darwin 11.0 Original release Available from the Mac App Store
11A511s August 16, 2011 Darwin 11.0 Build contained on Lion USB Thumb Drive Lion USB drive [90]
11A2061 and 11A2063 [91] July 20, 2011 Darwin 11.0.2 For Mid 2011 Mac Mini (11A2061) and Mid 2011 MacBook Air (11A2063) Lion Internet Recovery[92] (Command+Option+R upon reboot on Mid-2011 or later Macs)
10.7.1 11B26 August 16, 2011 Darwin 11.1.0 About the OS X Lion v10.7.1 Update Mac OS X v10.7.1 Update
11B2118 For the Mid 2011 Mac Mini and Mid 2011 MacBook Air Mac OS X v10.7.1 Update for MacBook Air and Mac Mini 2011
10.7.2 11C74 October 12, 2011 Darwin 11.2 About the OS X Lion v10.7.2 Update
Adds iCloud, various bug fixes, minor user interface tweaks, Safari 5.1.1, and the ability to boot into Lion Recovery from a Time Machine disk.
Mac OS X v10.7.2 Individual update (delta)

Combo update (includes 10.7.1)

References

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External links