Now that GFXBench Metal is out on OS X, when can at last test Metal performance and compare it to OpenGL. Here's my results (13" MacBook air with 1.5 GHz i5, intel HD 6000). I only use offscreen tests since V-Sync is clearly forced on the onscreen openGL tests. I indicate the Metal results first, units are fps except for texturing. Manathan: 24.7 - 30.5 T-Rex: 73.7 - 85.7 ALU 2: 74.5 - 77.6 Driver overhead 2: 56.8 - 51.8 Texturing: 4992 - 5144 So a clear advantage for OpenGL across the board, except for the driver overhead test. HOWEVER, it should be stressed that on this weak GPU, all other tests are GPU-bound and Metal is not predicted to bring ANY advantage here. So I think these results just show that the Metal drivers are not mature yet in respect to the GPU code they produce. I'd be interested to see results from other GPUs.