When I click on the Apple icon then click on About this Mac no version is displayed. I know the version is 10.4.10. Other problems: When I open iTunes I receive the following error: "You cannot use this application"iTunes" with this version of Mac OS X". When I open iMovie 06 I receive the following error: "iMovieHD requires Mac OS X v10.3.4 Panther or later. For more information on upgrading your computer, visit www.apple.com/macosx." I have deleted the .plist files for iMovie and iTunes w/o success. Any suggestions on fixing this problem would be appreciated.