Sorry to hear about all the problems you folks are having.
This “Serious error…” thing must be Mac related.
I recently got so pissed at Apple I decided to get a HP Z820. I havent seen any issues like you are reporting.
In fact its been rock solid with Kona 3 external display.
Phil, I also switched from Avid DS and FCP 7 prior to Premiere and my experience with dynamic link and After Effects capabilities has far exceeded my expectations.
Did you work at KPBS many years ago? It seems when I was on the studio crew I heard folks mention you by name.
Tom Daigon
PrP / After Effects Editor
http://www.hdshotsandcuts.com
https://www.youtube.com/watch?v=DxPrG3WUyz8
(Best viewed at 1080P and full screen)
HP Z820 Dual 2687
64GB ram
Dulce DQg2 16TB raid