@thor Oh, BTW about the spinning fans. I remember you said you used wired connection, but here is what I was talking about. b43 is the wireless network adapter driver in my late 2011 MBP as you can see, it consumes 12% of one of the cores — it's not much, but this is only copying files from a computer plugged into router with 100MBpS connection, I think it can get higher during streaming — not too much, but if your CPU is already overtaxed, it might make a difference.