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Big Sur won't install (public beta RC)

C

courboy

macrumors regular
Original poster
Mar 27, 2009
141
38
Hi

I'm trying to install Big Sur on my machine, and each time I try, it stops working at around the "10 minutes remaining" part.

I am currently running 10.15.6. The install ends by suggesting I can try again, which unfortunately doesn't seem to resolve anything.

Has anybody else had this issue or found a solution?
 
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Salty Pirate

Salty Pirate

macrumors 6502a
Oct 5, 2005
611
815
kansas city
me too. gets to 12 minutes and errors. 2018 MBP 15

turned off file vault. no dice
single user mode. no dice
reset PRAM SMC. no dice
turned off find my Mac. no dice

How is this possibly ready for release tomorrow?
 
Last edited:
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Dwalls90

Dwalls90

macrumors 603
Feb 5, 2009
5,505
4,568
Tommy Hewitt said:
Wait until tomorrow. The link to verify (or update?) BridgeOS isn't working yet.
Click to expand...
This is exactly what I think the issue is, because I had the same issue. I think there is an internet based verification process where Apple's servers aren't allowing everyone to just install the profile and update prematurely, and that verification is happening at the T2 chip. Can't speak to users with a Mac without a T2 chip may be experiencing.

Why do I think this?
  1. If you turn off your WiFi, the installer will halt installation and require you to enable it (since you can't verify with Apple if your device is offline).
  2. If you install the public beta profile and the latest public beta, it installs without a hitch. The builds between latest RC and latest public beta aren't that different, so it's unlikely that the RC introduced this big of a bug where it wasn't present in previous betas.
Someone who is not a registered Apple dev, but has successfully installed the latest RC using the normal install method without any workarounds can chime in to counterpoint me here. However, too many people with T2 chips seem to be having this issue for it to be a coincidence.
 
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M

matthewadams

macrumors 6502
Dec 6, 2012
379
168
There's a fix for that.
Simply run
Code: 
sudo nvram IASUCatalogURL=https://swscan.apple.com/content/catalogs/others/index-10.16seed-10.16-10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog
in terminal before running the installer.

Someone else posted a similar suggestion earlier that did not work, turns out there was a typo.

(Source: https://developer.apple.com/forums/thread/666174 )
 
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B

batting1000

macrumors 604
Sep 4, 2011
7,464
1,874
Florida
matthewadams said:
There's a fix for that.
Simply run
Code: 
sudo nvram IASUCatalogURL=https://swscan.apple.com/content/catalogs/others/index-10.16seed-10.16-10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog
in terminal before running the installer.

Someone else posted a similar suggestion earlier that did not work, turns out there was a typo.

(Source: https://developer.apple.com/forums/thread/666174 )
Click to expand...

This worked for me as well on my 2019 MBP. Was trying the typo version all day 🤣
 
richardtekel

richardtekel

macrumors member
Sep 25, 2016
40
53
After updating to 11.2 Big Sur won't boot anymore :-( Did setting nvram impact this or something else when upgrading to 11.0 in october? Only safe mode works, but not normal. Reinstall (without erasing disk) from recovery mode didn't help.
 
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