The code used to create the software for AFX 7 wasn’t made with the intention of Duel Intel Macs. It works, but not to it’s full potential. Depending on how many effects and keyframes you are using- this could be the cause. But not to worry, through the grapevines I’ve heard Adobe is soon to release a “Universal” AFX that will be completely compatable with the Intel Macs. At least yours is just a trial version :0). Hope this helps.
Jill