The mac pro – was on 10.6 and I did upgrade it to 10.7, though the symptoms were present before the upgrade. I will un-install fcp7 and do a re-install.
The iMac was new, clean install of 10.8.4 on which I installed fcp7. It seems funny that across both machines it is a persistent set of symptoms. On this iMac I did update 10.8.4. –> to 10.8.5 while FCP7 was installed.
When you mention updating or upgrading do you mean point increments e.g 10.8.4 to 10.8.5 ?
Or the major updates of OS 10.6 to 10.7 or 10.8 ?
I will do a memory test today on the mac pro, I have done numerous drive tests. The only common thing across the 2 machines is a incremental point upgrade.
Let you know how we travel, thanks for your input!