Big Problem to install Big Sur on my Mac Book Pro 15 Touch Bar 2016

Question

Created Jul ’20

Replies 6

Boosts 0

Views 3.8k

Participants 7

I've tried to install Big Sur, in a separate volume APFS, but the Mac go in boot loop for entire night. I've tried many times, but it's impossible to solve.
Then I've create a bootable usb with Big Sur, by terminal, and the problem to install the OS is, permission denied.
In the last, I've installed a new copy of Catalina in a new Volume, and I've tried to update to Big Sir by beta profile procedure. And the Mac go in boot loop again .

Please help !!! 😭

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Answer 1

NayanR12 OP

Jul ’20

Have this same issue any fix?

0

Answer 2

Damien_ OP

Jul ’20

I have the same with Big Sur beta 3 and a Mac Pro 2013.
Anyone get a solution?

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Answer 3

rabinsxp OP

Aug ’20

You can boot from Recovery (Command + R) and then use the Disk Utility tool to fix drives. Once fixed, just mount the boot devices and it should work on he next restart.

It worked on mine (macOS Big Sur 11.0 Beta)

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Answer 4

robertfromnanits OP

Aug ’20

Same issue, trying recovery, but every time drops to restart after 30-40 minutes.

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Answer 5

AxelK OP

Mar ’21

Same upgrade reboot problem. 2016 MBP running Catalina. I have tried every solution I could find in the different forums. Nothing worked for me. Finally reverted back to Catalina. Apple has a problem here that needs to be solved.

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Answer 6

cbraut OP

Mar ’21

I wonder if the problem does not come from an older EFI version.

To check the version using Terminal :

/usr/libexec/firmwarecheckers/eficheck/eficheck --integrity-check

To check if an update if necessary, you could use this SilentKnight (eclecticlight.co/lockrattler-systhist/).

If I well understand EFI is automatically updated with the OS. But sometimes it seems it is not.

In my case — MacBookPro14,3 running 10.15.7 —, EFI was 428.0.0.0.0 instead of 429.80.1.0.0 (eclecticlight.co/2019/10/08/which-efi-firmware-should-your-mac-be-using-version-4/).

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