Apple have released what could be the last update to OS X Snow Leopard before their next OS hits, Mac OS X Lion 10.7. Mac OS X 10.6.8 is available now and includes a number of "general operating system fixes," including improved VPN reliability and removal of known variants of Mac Defender.
What is probably the most important thing to note with 10.6.8 is that it includes an "Enhancement to the Mac App Store to get your Mac ready to upgrade to Mac OS X Lion". You will require 10.6.8 if you want to upgrade to Lion when it comes out next month. As for what is included in the 10.6.8 update, heres a run down:
Enhancements to the Mac App Store to get your Mac ready to upgrade to Mac OS X Lion.
Resolves an issue that may cause Preview to unexpectedly quit.
Improves support for IPv6.
Improves VPN reliability.
Identifes and removes known variants of MacDefender malware.
Corrects timezone data in iCal for Lisbon-Portugal.
Adds the ability to use Kerberos authentication to a web proxy server.
Fixes an issue when saving documents from Xcode or TextEdit when using an NFS home directory.
Fixes an issue when importing certain media files into Final Cut Pro.
Includes RAW image compatibility for additional digital cameras.
Addresses an issue in which some OpenType fonts don't display correctly in certain applications.
Resolves issues printing from Preview.
Addresses an issue with PDF files not opening in third-party PDF viewing applications.
Resolves invalid font errors when printing to PostScript printers.
The Mac OS X 10.6.8 update can be downloaded here.
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