Why are you running a trial of such an old version of AE? CS6 is internal version number 11. The current version (CC 2014) is version 13.
That being said, what other software do you have on that machine? DaVinci Resolve by chance?
Have you accidentally gotten some CUDA drivers on your machine? Avoid installing NVIDIA CUDA drivers on computers without NVIDIA GPUs
Thanks for replying.
Actually I've tried several versions including CC 2014, and the results are the same - same alert showed up.
As for CUDA drivers, I'm certain that I didn't install any drivers manually myself. I checked the directory "Mac HD/Library/Frameworks" and there is no CUDA.Frameworks. I didn't do system migration either. The only thing I did to the system is updating it to 10.10.
And I didn't install any other video processing software except those carried by OS X. I just installed two picture editing apps like Sketchbook which I don't think the cause is.
It is really weird...
I have a brand new Apple MBP running Yosemite 10.10, 2.5Ghz Intel Core i7, 16Gb Ram, NVidia GForce GT750M 2Gb Video Ram. Today in class (I teach animation college level using AE) AE 2014CC began crashing like crazy. Seems no matter what I was doing it would lock the entire machine.
After reading this thread my /Library/Preferences/Adobe folder did not have open write privileges across the board so I changed that setting. We will see if that fixes anything but in this case I tend to doubt it. I've seen the permission thing fix opening up Speedgrade, AE and a few other CC apps but the issue at hand is not opening them up, it is having it crash the whole machine once it is open. Quite frustrating... especially when one is trying to demonstrate in front of a class. I can only do so much with shadow puppets... ;-)