There seem to be issues with OpenGL2.0 AE7 and OSX.4.4 at the moment, we are using QuadraFX 4500 and have had to disable OpenGL in AE to improve performance. Adobe are talking to apple to resolve this issue.
Also Antialiasing and Motion Blur acceleration are not supported by the Apple drivers at the moment.
A bit disappointing but I’m sure it will be resolved soon enough