Answer to "MacBook Pro does not start""To force a spontaneous reboot, disconnect the battery and mag-safe. Press and hold the power button for 10 seconds. Reconnect the battery then the mag-safe and it should reboot. Lets take a good look at that battery. Please run and post your results using Coconut Battery: https://www.coconut-flavour.com/coconutb krogerfeedback..." THappy to help! Thanks for leaving a comment.