Trying to boot MBP it keeps restarting 1/2 way

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Trying to boot MBP it keeps restarting 1/2 way

Please help.

‘I can’t start my MBP after a split second power. Outage we recently had. It acts like it wants to start and gets halfway through and just reboots itself. I can’t access the net or any of my external drives. I did do a ha hardware check and it appears to be ok. I can’t remember how to zap the PRAM or any other key combination that might be helpful. I don’t even remember what key to hold to start up from the original startup disk.

T.I.A.

MacBook Pro 15″, OS X 10.11

Posted on May 12, 2022 8:25 PM

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Answer 1

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Owl-53

Level 10

103,369 points

May 13, 2022 4:43 AM in response to cherpbay

How to reset the SMC of your Mac

Reset NVRAM or PRAM on your Mac

It is suggested the User perform the above actions 3 times consecutively ( Bong 1, Bong 2, Bong 3 ) and release the keyboard combination.

If use a Bluetooth Keyboard, also suggest using a Wired USB KB as it is more reliable in this Specific Instance

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Answer 2

Owl-53

Level 10

103,369 points

May 14, 2022 2:28 AM in response to cherpbay

Holding the C key at startup will only attempt to boot into the Original Installation Media this computer Originally Came with as New.

Holding the S key will attempt to start the computer in Safe Mode

Safe Mode. This will perform a Disk Repair, clear cache files and only load Apple Software, extensions and fonts. The boot up will be slow and can take some time - Normal.

2 - Sometimes a Safe Boot followed by a Normal Boot will just put things right.

3 - Does the issue present in this mode ?

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Answer 3

cherpbay Author

Level 1

8 points

May 13, 2022 4:18 PM in response to Owl-53

I tried both of these but to no avail. The apple dos show up on the screen but it still wants to reboot when it gets to a certain point. I tried holding the c key down to get it to start from the original startup disk but that did’ t work either. Any more suggestions?

T.I.A.

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Answer 4

cherpbay Author

Level 1

8 points

May 16, 2022 3:33 PM in response to cherpbay

Thanks! I’ll try it! I couldn’t remember all the tricks of the trade. By MBP rarely breaks down.

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Trying to boot MBP it keeps restarting 1/2 way

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