When you "reinstalled", did you erase your HD? If so, yes you either have to re-install everything - including Parallels - from scratch, or find some kind of unerase utility that can locate your earlier configuration so you can back up accordingly.
If you merely overwrote your core system files but left the rest of your HD intact that may necessitate a less drastic step.
Of course I am shooting in the dark to some extent. But exactly what you meant by your phrase "reinstall my MAC OS X" matters a lot.
Last edited: Jul 10, 2007