Recovering a Boot-Looping MBP 2015
A boot loop after an update on the 2015 MacBook Pro usually indicates a corrupted EFI partition or a failed root patch.
Recovery Steps:
- Revive EFI: On another Mac, create a fresh OCLP USB.
- Boot Picker: Hold Option on boot and select the EFI Boot from the USB drive. This bypasses the corrupted internal EFI.
- Target Disk Mode: If you can't boot, hold T on boot to access your files from another Mac via Thunderbolt.
- Reinstall macOS: If recovery fails, use the OCLP USB to perform a clean install over the existing partition (this keeps your files but refreshes the OS).
Original Question: "Help: Early 2015 MBP Stuck in Boot Loop"
Background Info:
I recently bought a 2015 MBP (16gb RAM) for cheap on eBay.
The ssd wasn't being recognized, but after setting up and 1T external drive, I got it running Maverick. I then used a USB boot of High Sierra using OpenCore. It worked like a charm.
The Problem:
Now, I was trying to update it and it seemed to go through alright. However, I went to boot it up and now it's stuck in a boot loop. Internet Recovery (cmd + r), Safe Mode (shift), and Start Up Manager (option) all don't do anything. I've tried booting it with the external plugged in and removed (to see if it'd give the ssd error again) and it didn't change anything.
I've reset the NVRAM/PRAM as well to no avail.
I can't think of or find anything to get through this. Any ideas? It was only $65 so I'm not super torn if this is done forever, but I do want to get it working.
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