Thank you gentlemen for this information. I am currently running VW 16 on my 2008 iMac running OSX 10.10.5, while my 2014 iMac running OSX 10.15.6 with about 4 times the cranking power has to sit idly by because it can't run the application under the current OS, even though the 2008 iMac is straining under the load when to comes to rendering, or even when trying to boot the program. I suppose I could re-install the old OS (10.12.12) into the 2014 iMac, but then I'd be out of Sync with Apple's updates AND I understand (and experienced) that that particular OS was rather 'buggy'. So for now, I will leave it as is, and hammer on with VW 2016 on the 2008 iMac, running OSX 10.10. It's exasperating because it's a waste of the cost of new iMac and the VW 2016 application, since VW 2014 and 2015 will seem to run better on the 2008 iMac than does VW 2016,
Once again, THANKS for shining some light on this issue. PERHAPS I will look at installing VW 15 onto the 2014 iMac. It may give phenomenal results (???) MMMMmmmm?
Thanks again!