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ricoc90

macrumors newbie
Jun 22, 2018
27
73
I did successfully install Big Sur on my late 2012 Mac Mini. However, like a couple of others have mentioned I was unable to mount the root partition as read write (permission denied). no matter what I've tried. I did notice that the apfs partition is labeled as "apfs, sealed, local, journaled, nobrowse". I've never seen that before.

Catalina doesn't seem to be able to mount the volume either, so my attempt in removing it failed
 

libneko

macrumors member
Jun 22, 2020
62
165
Siberia
I did successfully install Big Sur on my late 2012 Mac Mini. However, like a couple of others have mentioned I was unable to mount the root partition as read write (permission denied). no matter what I've tried. I did notice that the apfs partition is labeled as "apfs, sealed, local, journaled, nobrowse". I've never seen that before.

Catalina doesn't seem to be able to mount the volume either, so my attempt in removing it failed
Do you have Filevault enabled or, maybe, a Fusion Drive? Is Big Sir in the same APFS Container as Catalina? I do have same problem and currently decrypting my drive, maybe it's the reason.
 

justperry

macrumors G5
Aug 10, 2007
12,627
9,922
I'm a rolling stone.
I just installed BS, a few hick-ups like the *stop sign but it works now although performance is impacted by indexing.
Now, the only thing to do is get Wifi working again, shouldn't be that hard, wired now.

A quick terminal command fixed it, although it took some time for my mac to recognise my keyboard.
 
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jhumroo

macrumors newbie
Jun 23, 2020
9
8
iPhone: 33.054157,-96.768379
Following the developments, since I have a late 2012 Mac Mini that I would like to update to Big Sur as well. It's a 2.3 GHz Quad-Core Intel Core i7 with 16GB RAM, and Intel HD Graphics 4000 1536 MB. Runs Catalina beautifully so the processor should be plenty powerful to run Big Sur. Not sure if it's the GPU that's not up-to par.
 
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ricoc90

macrumors newbie
Jun 22, 2018
27
73
Do you have Filevault enabled or, maybe, a Fusion Drive? Is Big Sir in the same APFS Container as Catalina? I do have same problem and currently decrypting my drive, maybe it's the reason.

It's not a Fusion Drive neither is Filevault enabled.

I installed Big Sir on an external HDD at first, but wasn't able to mount / as read write. Since this was painfully slow anyways I did do a reinstall of Big Sur on the internal SSD in the same APFS Container as Catalina, but still wasn't able to mount / as read write.
 

PiggyGamingYT3

macrumors newbie
Jun 22, 2020
20
29
Here's some issues I experienced while testing macOS Big Sur on my Late 2011 13" MacBook Pro

  1. WiFi card not working
  2. No Sound
  3. Brightness keys not working
  4. Logs off randomly
  5. Animations lag
  6. Settings shows System update notification
  7. Calendar icon displays the wrong date
  8. Menu bar and dock are not translucent (both light and dark modes)
  9. Launchpad lags
  10. Siri works, but not without internet
  11. White border around dock in Dark Mode
  12. Sleep Mode not working
  13. Computer randomly freezes
  14. Finder tags not showing color
  15. Patch Updater application for Catalina removed, PrefPane is still present
  16. Video Memory only registers as 3MB
  17. Display size shows as 21 Inch
 

brandonsierra

macrumors member
Jun 10, 2017
40
74
Here's some issues I experienced while testing macOS Big Sur on my Late 2011 13" MacBook Pro

  1. WiFi card not working
  2. No Sound
  3. Brightness keys not working
  4. Logs off randomly
  5. Animations lag
  6. Settings shows System update notification
  7. Calendar icon displays the wrong date
  8. Menu bar and dock are not translucent (both light and dark modes)
  9. Launchpad lags
  10. Siri works, but not without internet
  11. White border around dock in Dark Mode
  12. Sleep Mode not working
  13. Computer randomly freezes
  14. Finder tags not showing color
  15. Patch Updater application for Catalina removed, PrefPane is still present
  16. Video Memory only registers as 3MB
  17. Display size shows as 21 Inch
oof, a lot of issues there.

@dosdude1 will need to make a patcher gui for applying the kexts
 

libneko

macrumors member
Jun 22, 2020
62
165
Siberia
I've created simple script, that automates some of the required actions: https://github.com/4ndv/big-sur-plz

Huge thanks @ASentientBot for the patcher!

This script:

- Checks if SIP disabled
- Checks if FileVault disabled (will remove in the future if error 66 not caused by FileVault), this check can be skipped
- Disables library validation
- Adds -no_compat_check to the boot-args
- Automatically downloads and extracts patcher
- Runs installer with patcher, with a little bit different, but more stable method
 
Last edited:

ASentientBot

macrumors 6502a
Jun 27, 2018
863
3,421
SkyLight.framework
Here's some issues I experienced while testing macOS Big Sur on my Late 2011 13" MacBook Pro

  1. WiFi card not working
  2. No Sound
  3. Brightness keys not working
  4. Logs off randomly
  5. Animations lag
  6. Settings shows System update notification
  7. Calendar icon displays the wrong date
  8. Menu bar and dock are not translucent (both light and dark modes)
  9. Launchpad lags
  10. Siri works, but not without internet
  11. White border around dock in Dark Mode
  12. Sleep Mode not working
  13. Computer randomly freezes
  14. Finder tags not showing color
  15. Patch Updater application for Catalina removed, PrefPane is still present
  16. Video Memory only registers as 3MB
  17. Display size shows as 21 Inch
These are almost all to be expected on a machine that wasn't supported since High Sierra and hasn't had any patches applied.

#1-3, 12, 16-17 are easily fixed with kexts. #5, 8-9, 13-14 are caused by a lack of acceleration, which I'm hoping to fix eventually, but it's extremely difficult.

I also got the random logouts (most likely WindowServer crashes) even without any patches. It's probably due to a lack of Metal, but I didn't check.

In any case, I hope you didn't expect this to be even remotely usable yet. It's going to be a while. Thank you for testing though.
 

Humble-X

macrumors newbie
Jun 23, 2020
9
25
Ok I took a nap. So the WiFi works with that upgraded Airport Card I stated I have.
 

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libneko

macrumors member
Jun 22, 2020
62
165
Siberia
I've created simple script, that automates some of the required actions: https://github.com/4ndv/big-sur-plz

Huge thanks @ASentientBot for the patcher!

This script:

- Checks if SIP disabled
- Checks if FileVault disabled (will remove in the future if error 66 not caused by FileVault), this check can be skipped
- Disables library validation
- Adds -no_compat_check to the boot-args
- Automatically downloads and extracts patcher
- Runs installer with patcher, with a little bit different, but more stable method
Updated my Mac Mini 2012 guide with the script: https://medium.com/@andv/how-to-install-big-sur-to-mac-mini-late-2012-9d674b563174
 
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libneko

macrumors member
Jun 22, 2020
62
165
Siberia
I have the same model (Late 2012 Mac Mini). Sorry for the newbie question. How did you install Big Sur? Can you please share details since it's difficult to follow by reading all the different posts. Thanks!
I would much appreciate if you help me and try my new script, which automates some actions, and was written on Late 2012 Mini, here's guide: https://medium.com/@andv/how-to-install-big-sur-to-mac-mini-late-2012-9d674b563174
[automerge]1592948893[/automerge]
It covers installation, but not Wifi, I'm trying to do something with it, but still no success
 

Adamscomputerrepair

macrumors 6502a
Aug 9, 2015
549
287
I've created simple script, that automates some of the required actions: https://github.com/4ndv/big-sur-plz

Huge thanks @ASentientBot for the patcher!

This script:

- Checks if SIP disabled
- Checks if FileVault disabled (will remove in the future if error 66 not caused by FileVault), this check can be skipped
- Disables library validation
- Adds -no_compat_check to the boot-args
- Automatically downloads and extracts patcher
- Runs installer with patcher, with a little bit different, but more stable method
Is there any way we can make this work with High Sierra and Mojave? I kinda borked my Catalina installation....
 
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Adamscomputerrepair

macrumors 6502a
Aug 9, 2015
549
287
In my script, there is not a lot of things that prevents running on HS/Mojave, but idk if patcher itself works on Mojave/HS or not.
The script said (and I quote) “dyld: symbol not found: _objc_opt_class Referenced from /Users/default/big-sur-plz/Hax.dylib (which was built for Mac OS X 10.15) Expected in: /usr/lib/libobjc.A.dylib”

Did I do something wrong?
 
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libneko

macrumors member
Jun 22, 2020
62
165
Siberia
The script said (and I quote:) “dyld: symbol not found: _objc_opt_class Referenced from /Users/default/big-sur-plz/Hax.dylib (which was built for Mac OS X 10.15) Expected in: /usr/lib/libobjc.A.dylib”

Did I do something wrong?
Looks like patcher itself is not compatible with HS/Mojave, will tag @ASentientBot on this one
 
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