Apple has posted Mac OS X 10.4.6, the latest update to its 'Tiger' operating system. Released as both PowerPC and Intel versions, the new software incorporates the customary array of tweaks and fixes, but most notably incorporates a major revision of the OS' iSync tool. Indeed, Apple warned iSync users to synchronise their PDAs and/or mobile phones before installing the new release.

Another 'gotcha' with the PowerPC version is the way it forces the host computer to restart twice, once after the installation process is complete and then mid-way through the subsequent start-up sequence. This, Apple said, is deliberate, though it spooked this reporter when he updated his PowerBook last night.

A full list of published tweaks can be found here, with details on iSync 2.2 here.

Mac OS X 10.4.6 is delivered via the OS' Software Update system, but is also available from Apple's website in two forms: one to update Mac OS X 10.4.5 and another to update any version of the operating system from 10.4.0 upwards. Intel and PowerPC versions are available of each of these, and there are equivalent updates for Mac OS X Server. Each version incorporates all the most recent Mac OS X security updates.

All the updates are available now, here. ®