How do you turn off the MBP in sleep mode? Do I just hold the power button until it shuts off? I'm doing the battery calibration thing from apple's website... 4. Continue to keep your computer on until it goes to sleep. Save all your work and close all applications when the battery gets very low, before the computer goes to sleep. 5. Turn off the computer or allow it to sleep for five hours or more. 6. Connect the power adapter and leave it connected until the battery is fully charged again. So step 4 says let the computer go to sleep. Step 5 says turn off the computer, which is where I'm not sure how to do. And if I do turn it off, can i go straight to 6 or is it turn off the computer for five hours or more as well? Seems like an awful long process to do this entire thing.