Damn, that sucks,
Thanks though! You saved me days of pondering and troubleshooting in vain. I just found this article confirming what you said
https://www.reddit.com/r/protools/co..._video_engine/ .
He has links to a sweetwater article that essentially says the same thing. Apparently the PT 11 video engine only works with the i5 chip and up which they were manufacturing for the 27" late 2009 imacs (I'm using the 21.5 ").
Argh! Thanks a lot Avid...
Logic it is then...