For those with 9400 or the 320, we are very aware that it is not playable in a lot of zones. We will optimize the game to change this.
We just need some time, I hope you understand that we can't release a patch with such a change very quickly. We do not want to introduce a bigger problem.
If you do not have an integrated video card like the 9400, 320 or HD3000 and your FPS is below 10 then something isn't right.
There's a few thing you can try.
1. Choose your graphic settings. Turning off the shadows and lowering your resolution will have the biggest impact.
2. Restart your computer, do not simply log off, reboot it.
3. Start Diablo 3 and nothing else.
4. Do not change your graphic settings.
You should also make sure that you have at least 5 GB left on your main hard drive. OSX needs this to perform correctly.
Thank you for a long awaited response !!!!