Mac GPU still does not work correctly all the time. Until it does, there should be a Second Check box for GPU Performance.

there are times that the GPU is better, but most of the time it's completely glitchy. Until that's fixed we should have a CHECK BOX for DEFAULT to CPU.

Currently GPU Checked forces it to be on first. If uncheck you can not switch it without going into preferences.

It's a little thing but until this can be fixed, this is a better workflow... it might be good to keep even after it's fixed too.