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Mac OS X This operating system was released on 28th of August The performance of Mac OS X has been enhanced greatly and there is a reduction in the memory footprints. The name Snow Leopard suggests greater improvements in the previous Leopard version. New programming framework like OpenCL has been created which has enabled the developers to use graphic cards in their applications.
License[ edit ] Snow Leopard is available as an upgrade for Intel-based Macintosh computers. Single-user licenses and "family pack" licenses for up to five computers are available. For qualifying Mac computers bought after June 8, , Apple offered a discounted price through their "up-to-date" program provided that customers' orders were faxed or postmarked by December 26, There are three licenses available. Leopard Upgrade: If you have purchased an Upgrade for Mac OS X Leopard license, then subject to the terms and conditions of this License, you are granted a limited non-exclusive license to install, use and run one 1 copy of the Apple Software on a single Apple-branded computer as long as that computer has a properly licensed copy of Mac OS X Leopard already installed on it.
Single Use: Subject to the terms and conditions of this License It is not entirely clear which license is offered with the retail version of Snow Leopard. On the other hand, some Apple press materials appear to indicate that this version is, in fact, the "Single Use" license: New or changed features[ edit ] Mac OS X Snow Leopard is intended to be a release aimed to refine the existing feature set, expand the technological capabilities of the operating system, and improve application efficiency.
Many of the changes involve how the system works in the background and are not intended to be seen by the user. For example, the Finder application was completely rewritten in the Cocoa application programming interface.
Despite significant changes in the software, users will experience almost no changes in the user interface. Snow Leopard includes the following changes: Released on version The new version also adds support for advanced features on Cinema Displays and a new command-line version of the Startup Disk Control Panel. The Finder has been completely rewritten in Cocoa to take advantage of the new technologies introduced in Snow Leopard.
The default install only contains those drivers needed for existing printers and a small subset of popular printers. However, only Microsoft Exchange is supported and customers using prior versions of Exchange must either upgrade or use Microsoft Entourage.
Full multi-touch trackpad support has been added to notebooks prior to those introduced in October This limitation has now been removed in Snow Leopard. Preview can infer the structure of a paragraph in a PDF document. QuickTime X , the next version of QuickTime player and multimedia framework, has been completely rewritten into a full bit Cocoa application and builds on the media technologies in Mac OS X, such as Core Audio , Core Video , and Core Animation , to deliver playback.
Apple has redesigned the QuickTime user interface to resemble the full-screen QuickTime view in prior versions, where the entire window displays the video. The titlebar and playback controls fade in and out as needed.
Safari 4 features Top Sites, Cover Flow, VoiceOver, expanded standards support, and built-in crash resistance, which prevents browser crashes caused by plug-ins by running them in separate processes. Time Machine connection establishment and backups are now much faster. VoiceOver has also been greatly enhanced in Snow Leopard.
On newer Apple portables, trackpad gestures can be used to control VoiceOver functions, including the "rotor" gesture first seen in VoiceOver for the iPhone 3GS , allowing for the changing of certain VoiceOver navigation options by rotating fingers on the trackpad. Braille Display support is also improved, with Bluetooth displays supported for the first time. Instead, the interface has been modified in several areas to promote ease of use. These changes include: The "traffic light" titlebar controls are now slightly lighter in appearance and have less depth than they did in Mac OS X Windows are arranged in a new grid pattern.
Contextual menus which come out of Dock icons now have more options and have a new look, with a semi-transparent charcoal background and white text. An option has been added to the Finder preferences that allows the user to modify search behavior.
The default setting can be selected to 1 search the entire computer, 2 search only the current folder from which the search was initiated, or 3 perform the search based on the previously used scope. Dock Stacks , when viewed as a grid, allow viewing of a subfolder as a new stack, rather than launching a Finder window, in a manner similar to "tunnelling".
When viewed as grids or lists, scroll-bars are provided to navigate folders with more items than the current screen resolution will accommodate, as the program does not scale the icons to show as many as possible the way it did in OS X There are new wallpapers in the Nature two of which are of snow leopards , Plants and Black and White sub-folders under the Apple folder.
Furthermore, there are new Apple wallpaper sub-folders with multiple wallpapers: Pinstripe and Saree. New solid colors can be used as wallpapers as well. There is a new blue and gray, as well as a solid kelp which serves as the "green wallpaper.
AppleTalk is no longer supported. While there are workarounds for some applications, others such as Adobe After Effects CS4 will not be able to be run in a different language than the one installed  without using Terminal commands or third-party software.
Creator codes , which are per-file metadata attributes that define, for a file that has a creator code, what application should open that file, regardless of its extension, have had their priority in the application selection process reduced.
In addition, the Mac OS X kernel has been rebuilt to run in bit mode on some machines. Newer Xserve and Mac Pro machines will run a bit kernel by default; newer iMac and MacBook Pro machines can run a bit kernel, but will not do so by default. Stuart Harris, software product marketing manager at Apple Australia, said, "For the most part, everything that they experience on the Mac, from the bit point of view, the applications, the operating system, is all going to be bit, but that at this stage there were very few things, such as device drivers, that required bit mode at the kernel level".