Apple released today MacOS 9.2.2 and the upgrade is available fo download. The new version improves Classic application compatibility in MacOSX and delivers updated support for Macintosh systems that are based on the PPC G3 or G4 CPUs. MacSlash also reports that “John Siracusa, author of many great in-depth articles on OSX at ARSTechnica has begun a petition to try to convince Apple to continue using metadata in the filesystem. Basically, without the metadata OSX relies on file extensions to know what type of document each file is, just like Windows. For a more in-depth explanation read John’s ‘Metadata, The Mac, and You’…” Sign the petition.In other MacOS news, Connectix has released an updated version of Virtual PC. Some notable features include support for MacOSX , multiple processors (on MacOSX), DVD mounting, ISO image mounting, and undoable drives. Also includes improved networking and bug fixes. The software, which supports both Mac OS 9 and OS X, comes in separate versions for PC-DOS, Windows 98, 2000 or XP. The PC-DOS and Windows 98 versions are available immediately; the others are not expected to go on sale until late December. Besides running Windows within Mac OS 9 or X, Virtual PC 5 lets people drag and drop files between the operating systems. An upgrade costs $79. The full PC-DOS version sells for $99, while the Windows 98 version costs $199.