Answer to: How can I restore the firmware on the MacBook Pro 5,1I agree with rj713, try a PMU reset. To do this, shut your computer down, take out your battery, unplug from the wall. Then press and hold the power button for roughly 30 seconds. Put the battery back in, plug it back into the wall, and boot the computer! [EDIT] Oops, forgot that this is a Unibody. Forget what I said, that's for older MacBooks. Make sure you are plugged into the wall, and your computer is off. Then press the (left side) Shift-Control-Option keys and the power button at the same time. Then release them all at the same time. Then boot your computer.