Apple on Monday evening released Mac OS X 10.5.4, the latest significant revision to Leopard and a key part of its online strategy. Also, Security Update 2008-004 and Safari 3.1.2 for Tiger address security issues for earlier Mac OS X versions. The update (59MB for 10.5.3 users) is considered an important precursor to Mac support for MobileMe, Apple’s imminent sync and hosting service. In addition to laying the groundwork for the future replacement for .Mac, the update is also key to fixing a number of major bugs identified since the release of Mac OS X 10.5.3, including an Adobe CS3 corruption bug with remote file saves and a chronic shutdown flaw.Also mended with the fix are reliability with AirPort when on 5GHz 802.11a and 802.11n networks, iCal stability, access to secure websites with Safari, and a number of fixes for Expos? and Spaces.

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