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.

On August 28, 2009, it was released worldwide, 2 and was made available for purchase from Apples website and its retail stores at the price of US29 for a single-user license.

As a result of the low price, initial sales of Snow Leopard were significantly higher than that of its predecessors.

The release of Snow Leopard came nearly two years after the introduction of Mac OS X Leopard, the second longest time span between successive Mac OS X releases (the time span between Tiger and Leopard was the longest).

Apple famously marketed Snow Leopard as having zero new features.

Much of the software in Mac OS X was extensively rewritten for this release in order to take advantage fully of modern Macintosh hardware.

New programming frameworks, such as OpenCL, were created, allowing software developers to use graphics cards in their applications.

This was also the first Mac OS release since System 7.1.1 that does not support Macs using PowerPC processors, as Apple intended to focus on Intel-based products.

As support for Rosetta was dropped in Mac OS X Lion, Snow Leopard is the last version of Mac OS X that is able to run PowerPC-only applications.

Snow Leopard was the last version of Mac OS X to be distributed primarily through optical disc, as all further releases were distributed through the Mac App Store introduced in the Snow Leopard 10.6.6 update.

Because of this, Snow Leopard still remained somewhat popular alongside Mac OS X Tiger, despite its lack of continued support, 15 mostly because of its ability to run PowerPC-based applications.

Yonah processors such as Core Solo and Core Duo can run only 32-bit applications; later x86-64 architecture processors such as Core 2 Duo, Core i5 and i7 are also able to run 64-bit applications.

Single-user licenses and family pack licenses for up to five computers are available.

For qualifying Mac computers bought after June 8, 2009, Apple offered a discounted price through their up-to-date program provided that customers orders were faxed or postmarked by December 26, 2009.

Disk Cleaner Tiger Upgrade Path From

The standalone retail version of Snow Leopard is marketed as being restricted to users of Mac OS X Leopard, while the recommended upgrade path from Apple for Mac OS X Tiger is through the Mac Box Set, which includes Mac OS X Snow Leopard and the current versions of iLife and iWork.

Used for the non-upgrade and Mac Box Set versions of Snow Leopard.

As noted above, Apples website advertised this version as an upgrade from Mac OS X Leopard for 29 and suggest that others upgrade using the Mac Box Set, implying the stand-alone retail version to be a Leopard Upgrade license.

On the other hand, some Apple press materials appear to indicate that this version is, in fact, the Single Use license.

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.

The new version also adds support for advanced features on Cinema Displays and a new command-line version of the Startup Disk Control Panel.

Disk Cleaner Tiger Drivers Are Now

Some of the recovered disk space (250 MB) is because printer drivers are now downloaded or installed only as needed, rather than being pre-installed.

The default install only contains those drivers needed for existing printers and a small subset of popular printers.

However, only Microsoft Exchange 2007 is supported and customers using prior versions of Exchange must either upgrade or use Microsoft Entourage.

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.

Reading of web pages is improved with Auto Web Spots areas of a page automatically designated for quick access.

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