Update: I've tried reinstalling my quite legal FCP3 Studio retail package (FCP7 plus cousin apps) on a replacement 12-core tower purchased from Florida company Reverb. Not bad! Running El Capitan.
But No Go!! Something prevents the DVD from installing. Some weird system ID I think is part of the problem. Retroactive may be a solution in getting old FCP projects to XML files for transfer to Premiere. I have Mojave running on the old 2013 cylinder.
Anyone with success story please share!
Best as always,
Loren