no this is the only mac I have.
like 105 GB. and im usually not running anything but the installer.
Does your 13" have integrated or discreet graphics?
Here's the answer to what I think is the problem:
You are running FCP5 on the macbook pro. FCP5 goes through a system check and requires that you have a PPC system.
You will need FCP 5.1 or higher to run on an intel machine like the macbook pro. A simple rosetta install will not solve this issue.
Even FCP 7.0 is still PPC. It runs just fine on my 13" w/rosetta. Sorry can't really help with your version....
got my version on the internet