Stuck on boot - 100% Loading

[bp1000]

I have a late 2013 MBP which was ruined by Big Sur. So slow and randomly laggy, I finally threw the towel in and booted into recovery mode and performed an erase and restore from last Catalina backup.

All went well, HD erased, OS installed in about 15 min. It said system rebooting to complete installation and nothing happened. Stayed on the recovery/install screen after the countdown finished and just said system rebooting, it never did.

Was about to power off when I clicked randomly and it switched to the black screen with white apple logo and loading bar. It was at 100% and each time I reboot it just gets stuck at 100%.

I've waited about 30mins and nothing, tried rebooted several times and resetting the NVRAM.

Any ideas?

Thanks

 

[Audit13]

Could be a defective SSD? Try installing the os on an external drive and then boot from the external.

 

[Fishrrman]

OP wrote:
"I finally threw the towel in and booted into recovery mode and performed an erase and restore from last Catalina backup."

Did you boot to the recovery partition? (command-R)
or
Did you boot to INTERNET recovery? (command-OPTION-R)

If you booted only to the recovery partition, then you DID NOT "erase" the drive (by that, I mean "the ENTIRE drive").

Also, if you need to "go back and erase it again" (using internet recovery), you also need to do this:
- Boot to INTERNET recovery (command-OPTION-R)
- Get to the internet utilities
- Open disk utility
- IMPORTANT STEP: go to the view menu and choose "show all devices"
- NOW click on "the top line on the left" (that represents the physical drive), and erase the ENTIRE drive
- Then, quit disk utility and open time machine (if you're using that), and do the restore.

You may have done these things already, but posting this just in case you might have overlooked it (many folks do).