[Pablo Biglang-awa]

I’m on Macbook Pro (mid-2012). I also had the same non-playback issue. I thought it was because of my recent OS X uodate to 10.8.3 or a CUDA driver issue but I found out that the culprit was in my Premiere CS6 Audio Hardware Preferences setting. I recently switched my >Preferences>Audio Hardware>Default Device> to Motorola S305 bluetooth headset. I just switched back to System Default Input/Output and it now works.