If you have a DVD player and the OS X DVD Player is not in your Applications folder, try running System Update with the DVD Player connected/inserted (as in the case with Pismos etc.)
When I installed OS X on my machine, I didn't have my DVD player inserted (got a pismo) and I had to update it with the device loaded so that the system would recognize the need for it.
Hope it helps...
Hail Eris! All Hail Discordia!
IO IO ERIS!
- (don't ask...) Aslan
Hail Eris! All Hail Discordia!
IO IO ERIS!
- (don't ask...) Aslan