Mac OS 10.6 Snow Leopard

Mac OS 10.6 Snow Leopard, formally announced on June 9, 2009, is the sixth significant update to Mac OS X, Apple's UNIX-based desktop operating system. It became available in stores (including the University's Computer Connection) on August 28, 2009.

Information Systems & Computing (ISC) currently supports Mac OS 10.6 Snow Leopard for its clients, including off-campus students, only on new Macintoshes that ship with Mac OS 10.6 pre-installed. ISC strongly recommends that all other University users adopt a "wait and see" approach, continuing to use previous versions of the Mac OS (including Mac OS 10.4.11 and Mac OS 10.5.8) until the initial bugs in Mac OS 10.6 are identified and fixed.

When ISC recommends this upgrade, it will be for Apple systems with an Intel processor (Mac OS 10.6 does not function on PowerPC-based systems) that have at least 1.5 GB of RAM. The full install of Mac OS 10.6 Leopard uses at least 7.0 GB of disk space, depending on the type of Macintosh and choices made during the install.

Mac OS 10.6 Snow Leopard is available as an upgrade from Mac OS 10.5 for $29 from the Computer Connection. Users upgrading from Mac OS 10.4 need to purchase either the Mac Box Set, at $169 or (if they don't need the iWork and iLife upgrades) the combination of Leopard ($69) and Snow Leopard ($29).

Issues

There are a number of known issues with Mac OS 10.6 Snow Leopard, several of which are especially relevant to Penn's Macintosh users:

Supported Applications

• Norton AntiVirus 11.0.x for Mac OS X does not function as expected with Mac OS 10.6 Snow Leopard - most of the automatic protection is non-functional, along with other issues. Symantec intends to release a fully compatible version as soon as possible.
• The Network Applications Installer on the PennConnect Fall 2009 DVD installs correctly, but, as stated above, Norton AntiVirus does not function correctly after installation and updating. ISC intends to release a Mac OS 10.6 Snow Leopard-specific Network Applications Installer as soon as it is tested and available.
• PGP Whole Disk Encryption does not function with Mac OS 10.6, though PGP Desktop works as expected.

Other Applications

• Since this update includes a significant revision to the file structure of the OS itself, ISC anticipates that there may be problems with the current crop of disk utilities. Because of this, ISC strongly recommends that users wait until further testing determines which utilities will and will not work with Mac OS 10.6 Snow Leopard.

Changes in Mac OS 10.6

Though mostly an optimization release, Mac OS 10.6 Snow Leopard does have some new features. Below are some changes that may be of interest to the Penn community:

1) Speed, Speed, Speed

Mac OS 10.6 has a host of speed improvements compared to Mac OS 10.5. In ISC testing, Mac OS 10.6 installs more quickly, boots faster, performs various Finder functions more quickly, and substantially shortens the time required to make an initial Time Machine backup.

2) Finder

The Finder has been completely rewritten in Cocoa to take advantage of modern technologies such as 64-bit support and Grand Central Dispatch. Performance is improved throughout the Finder and it includes new features such as customizable Spotlight search options and an enhanced icon view that lets you thumb through a multipage document or watch a QuickTime movie.

The Finder interface has been further enhanced with contextual menus in high contrast (white text on black background) and improved animations for stacks. Additionally, the Finder allows users to restore items from the trash to their original locations by choosing the Put Back command.

2) Additional Exchange 2007 Functionality

Exchange 2007 Support allows the combination of Apple Mail, iCal, and Address Book to more effectively communicate with the University's Exchange services.

3) 64-bit

Nearly all system applications, including the Finder, Mail, Safari, iCal, and iChat, are now built with 64-bit code. Not only are they able to take full advantage of all the memory in a Mac, but the move to 64-bit applications also boosts overall performance.

4) Universal Access

Universal Access includes several updates. More braille readers are supported (including Bluetooth braille readers), along with significantly enhanced VoiceOver capabilities (such as faster keyboard navigation and trackpad control) and tutorials.

5) Security

Mac OS 10.6 Snow Leopard includes at least some level of malware detection - a first for an Apple operating system. The new 64-bit code is also somewhat more resistant to various attacks.

6) Grand Central Dispatch and OpenCL

Grand Central Dispatch takes full advantage of modern multicore systems by making all parts of the Mac OS multicore aware and optimizing it for allocating tasks across multiple cores and processors. OpenCL (Open Computing Language) allows developers to tap into the computing power in graphics processors and use it for any application.

7) QuickTime X

QuickTime X includes a brand-new player application, offers optimized support for modern codecs, and delivers more efficient media playback, making it ideal for any application that needs to play media content.