Boy, if anyone out there can answer this for you, I would really appreciate it. The skinny:
A few years ago, I discovered that my FCP 4 program could not export my projects using the Compressor or Conversion functions, because of an incompatibility between the program and the processor on my then-new iMac9, which runs Mac OS 10.5.
However, I found instructions online, SINCE LOST, about how to go into one of the Library files on my computer and alter one simple line of code. That enabled me to export without difficulty.
Unfortunately, I recently had to reinstall the program from scratch, which reset the library code to the original settings.
Does anyone remember this problem, or how to fix it?