Originally Posted by davistld01
Will I have to go back to Windows to upgrade and sync my BlackBerry?
Since you are using a G4, the short answer is Yes. Or set up a windows instance on the Mac.
* Mac OS X v10.5.7 and above (Only 32-bit mode is supported on Mac OS X v10.6)
* BlackBerry® Device Software v4.2 or higher
* iTunes v7.7.1 or later
Plus OS updates are exe files which will not run on a Mac. Official OS releases from your carrier will work, however.