macOS 11 Big Sur on Unsupported Macs Thread

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Stevejediknight

macrumors newbie
Jul 3, 2020
7
11
SUCCESS! Big Sur beta 3 on iMac late 2013 (iMac 14.1)

I have used the old method, csrutil disable from recovery passing from @jackluke opencoreloader3, then using @ASentientBot very simple installer with hax3. After installation all works perfectly: acceleration, wifi, bluetooth, internal sounds in and out and it is REALLY FAST on a Samsung T5 external SSD. Now I can test all the options and 3th party softwares. Its really a shame that Apple doesn't support it officially.

To all Big Sur on Unsupported mac forum users: Just tell me if you need help to patch this 7 years old Mac!

Thank you very much @jackluke and @ASentientBot I'm available for all test you could need to help others to fix issues, also for the Mac mini 2010.
I have a 2012 iMac 21.5. Do you think the procedure you followed would work on mine? Anyone successfully load BS on a 2012 iMac with everything working? Thanks
 
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nandor690

macrumors 6502
Jun 25, 2011
273
153
Good evening wonderful people. I’m having a problem that is pissing me off because I know I’m missing something stupid.
Berrys latest installer gives me an error 3 when trying to pick the hard drive to install to. And Parrotgeeks latest installer will go into a boot loop after the first reboot during install. I have SIP disabled and also have run the no compat check mutiple times.
catalina has no problem installing so I don’t think thats the issue anyway.
i am trying to install macOS Big Sur beta 3 on a 2009 Mac Pro flashed to a 5,1.

thanks for any help everyone.
 
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David403

macrumors member
Nov 5, 2017
73
82
Maui, HI
Good evening wonderful people. I’m having a problem that is pissing me off because I know I’m missing something stupid.
Berrys latest installer gives me an error 3 when trying to pick the hard drive to install to. And Parrotgeeks latest installer will go into a boot loop after the first reboot during install. I have SIP disabled and also have run the no compat check mutiple times.
catalina has no problem installing so I don’t think thats the issue anyway.
i am trying to install macOS Big Sur beta 3 on a 2009 Mac Pro flashed to a 5,1.

thanks for any help everyone.
Just Use Opencore



Works perfectly on my MacPro 5,1 and my macPro 4,1 flashed to 5,1
 

nandor690

macrumors 6502
Jun 25, 2011
273
153
Just Use Opencore



Works perfectly on my MacPro 5,1 and my macPro 4,1 flashed to 5,1
that did not go well lol. Booting from efi or option and then picking my Catalina drive only boots to recovery 🙄
 
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Alex-Microsmeta

macrumors 6502
Jul 14, 2018
256
404
Rome
SUCCESS! Big Sur beta 3 on iMac late 2013 (iMac 14.1)

I have used the old method, csrutil disable from recovery passing from @jackluke opencoreloader3, then using @ASentientBot very simple installer with hax3. After installation all works perfectly: acceleration, wifi, bluetooth, internal sounds in and out and it is REALLY FAST on a Samsung T5 external SSD. Now I can test all the options and 3th party softwares. Its really a shame that Apple doesn't support it officially.

To all Big Sur on Unsupported mac forum users: Just tell me if you need help to patch this 7 years old Mac!

Thank you very much @jackluke and @ASentientBot I'm available for all test you could need to help others to fix issues, also for the Mac mini 2010.
Not a single problem on iMac 2013! And it works out of the box (after patching the installer thanks to the geniouses here 🤓) It is also faster than Catalina and very stable, to be only a Beta 3. Compatibile with all 3th parts applications tested until now. (I will report only not working ones) Mac ARMs can wait a long time for me.. 😊
 

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Alex-Microsmeta

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Jul 14, 2018
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I have a 2012 iMac 21.5. Do you think the procedure you followed would work on mine? Anyone successfully load BS on a 2012 iMac with everything working? Thanks
Yes, use @ASentientBot hax3 and @jackluke fixes if needed. Ask me how to do specifics steps, I'm happy to help you. The only limits are about Nvidia card, but is better than mine on Mac mini 2010 and I thiink that acceleration would work fine for you.

Grafica
  • 2,7GHz
    Processore grafico NVIDIA GeForce GT 640M con 512MB di memoria GDDR5
  • 2,9GHz
    Processore grafico NVIDIA GeForce GT 650M con 512MB di memoria GDDR5
 
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Enrico Ferro

macrumors newbie
Jul 31, 2020
3
6
Hi guys, i would like to install Big Sur on my unsupported MBP Retina late 2012 13.
Some days ago i upgraded the wifi card (now it’s 802.11ac) and hd (with a Trascend Jetdrive with 240gb, so that i can add a new dedicated partition...in APFS), so i’m ready

BUT WHERE TO START? PARROTJEEK TOOL? OR barrykr big-sur-micropatcher?

Which is simplest? And more efficient?

Once i will have installed Big Sur can i normally install the future updates? Or it will be necessery to repeat every time the patched procedure?

I’m not a registered developer, so is it better to wait the public beta or to use the Developer beta3?

thank you wery much and exscuse me for all my questions?

Regards
 
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GSXB

macrumors regular
Jun 21, 2018
159
141
England
Good evening wonderful people. I’m having a problem that is pissing me off because I know I’m missing something stupid.
Berrys latest installer gives me an error 3 when trying to pick the hard drive to install to. And Parrotgeeks latest installer will go into a boot loop after the first reboot during install. I have SIP disabled and also have run the no compat check mutiple times.
catalina has no problem installing so I don’t think thats the issue anyway.
i am trying to install macOS Big Sur beta 3 on a 2009 Mac Pro flashed to a 5,1.

thanks for any help everyone.
I’m having the very same problem, I’ve tried loads of different forks of patchers but no joy.
Did you manage to solve the problem
 
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MacStory3

macrumors member
Jun 28, 2020
49
86
SUCCESS! Big Sur beta 3 on iMac late 2013 (iMac 14.1)

I have used the old method, csrutil disable from recovery passing from @jackluke opencoreloader3, then using @ASentientBot very simple installer with hax3. After installation all works perfectly: acceleration, wifi, bluetooth, internal sounds in and out and it is REALLY FAST on a Samsung T5 external SSD. Now I can test all the options and 3th party softwares. Its really a shame that Apple doesn't support it officially.

To all Big Sur on Unsupported mac forum users: Just tell me if you need help to patch this 7 years old Mac!

Thank you very much @jackluke and @ASentientBot I'm available for all test you could need to help others to fix issues, also for the Mac mini 2010.
How did you do the steps with jackluke's loader? I can't figure out an order or what patches to include that works.
 
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Alex-Microsmeta

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Jul 14, 2018
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How did you do the steps with jackluke's loader? I can't figure out an order or what patches to include that works.
I have mainly followed the tutorial of QuaccOS https://forums.macrumors.com/thread...d.2242172/page-62?post=28647237#post-28647237

briefly:

1) Prepare the installer with @ASentientBot HAX patch.
2) Install OpenCoreLoader3b from @jackluke
3) Run in terminal from recovery (inside OpenCoreLoader3b) : csrutil disable
4) Launch Install macOS again inside OpenCoreLoader3b
5) Done, without other patches or fixes, in my iMac14.1 all works stable and FAST :)
 

hvds

macrumors 6502
Sep 1, 2017
283
601
Switzerland
Not a single problem on iMac 2013! And it works out of the box (after patching the installer thanks to the geniouses here 🤓) It is also faster than Catalina and very stable, to be only a Beta 3. Compatibile with all 3th parts applications tested until now. (I will report only not working ones) Mac ARMs can wait a long time for me.. 😊
Does Photos6.0 run fine in your case?
 
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ricoc90

macrumors newbie
Jun 22, 2018
27
73
Someone with Mac Mini 2012, running beta 3 and wifi working?
Which guide should I follow?
Yes.

So, basically (assuming you haven't installed beta 3 yet):
  1. If you haven't already, download beta 3 from here
  2. Make sure SIP is disabled and -no_compat_check is set:
    Boot into recovery or USB installer, open up terminal and run
    Code:
    csrutil disable
    nvram boot-args="-no_compat_check"
  3. Reboot into macOS and download hax3 by ASentientBot from here
  4. Run the app hax3.app and install beta 3.
  5. Once installation is done, you'll find Wifi not working. Download IO80211Family.kext from this post
  6. Boot into recovery or installer USB and fire up terminal
  7. Replace the current IO80211Family.kext from beta 3 with the one you've downloaded in step 5:
    First, mount your Big Sur volume with write access:
    Code:
    diskutil mountDisk /dev/diskxsx (where x corresponds to your Big Sur volume. e.g. /dev/disk1s5)
    mount -uw /Volumes/volume_name (where volume_name is the name of your Big sur volume)
    Then replace the kext and create a snapshot:

    Code:
    # Backup original
    cd /Volumes/volume_name/System/Library/Extensions/
    mv IO90211Family.kext IO90211Family.kext.backup
    
    # Copy over the replacement
    cp -r /path/to/the/downloaded/IO80211Family.kext .
    
    # Set permissions (I haven't done this step myself and it works fine)
    chown -R 0:0 .
    chmod -R 755 .
    
    # Update
    kmutil install --volume-root /Volumes/volume_name --update-all --force
    /Volumes/volume_name/usr/sbin/kcditto
    
    # Create snapshot
    bless --folder /Volumes/volume_name/System/Library/CoreServices --bootefi --create-snapshot
  8. Reboot and Wifi should work.
Note: this won't give you write access (error 66), if you need that you'll either need to build hax3 yourself with DoNotSeal set to false or use an older version of Hax which you can download here and once the installtion is finished, follow these steps to disable snapshots:


After which you'll be able to mount -uw within beta3 and install the IO80211Family.kext using jackluke's method:

 

jesus_sanse

macrumors newbie
Aug 1, 2020
2
3
Yes.

So, basically (assuming you haven't installed beta 3 yet):
  1. If you haven't already, download beta 3 from here
  2. Make sure SIP is disabled and -no_compat_check is set:
    Boot into recovery or USB installer, open up terminal and run
    Code:
    csrutil disable
    nvram boot-args="-no_compat_check"
  3. Reboot into macOS and download hax3 by ASentientBot from here
  4. Run the app hax3.app and install beta 3.
  5. Once installation is done, you'll find Wifi not working. Download IO80211Family.kext from this post
  6. Boot into recovery or installer USB and fire up terminal
  7. Replace the current IO80211Family.kext from beta 3 with the one you've downloaded in step 5:
    First, mount your Big Sur volume with write access:
    Code:
    diskutil mountDisk /dev/diskxsx (where x corresponds to your Big Sur volume. e.g. /dev/disk1s5)
    mount -uw /Volumes/volume_name (where volume_name is the name of your Big sur volume)
    Then replace the kext and create a snapshot:

    Code:
    # Backup original
    cd /Volumes/volume_name/System/Library/Extensions/
    mv IO90211Family.kext IO90211Family.kext.backup
    
    # Copy over the replacement
    cp -r /path/to/the/downloaded/IO80211Family.kext .
    
    # Set permissions (I haven't done this step myself and it works fine)
    chown -R 0:0 .
    chmod -R 755 .
    
    # Update
    kmutil install --volume-root /Volumes/volume_name --update-all --force
    /Volumes/volume_name/usr/sbin/kcditto
    
    # Create snapshot
    bless --folder /Volumes/volume_name/System/Library/CoreServices --bootefi --create-snapshot
  8. Reboot and Wifi should work.
Note: this won't give you write access (error 66), if you need that you'll either need to build hax3 yourself with DoNotSeal set to false or use an older version of Hax which you can download here and once the installtion is finished, follow these steps to disable snapshots:


After which you'll be able to mount -uw within beta3 and install the IO80211Family.kext using jackluke's method:

Thanks. I will try it. I installed beta 1, but it didn’t work properly. I’ll start from zero
 
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hvds

macrumors 6502
Sep 1, 2017
283
601
Switzerland
I made a simple experimental script to patch the BigSur beta3 BaseSystem.dmg to use prelinkedkernel and to allow booting from non-APFS or legacy USB Mac, but currently you need a BigSur installation and run this directly from BigSur because you need "243 stock BigSur kext" (240 MB) to fix BaseSystem (but I'll try to figure out how to replace less of them).

In the script is also included the @Barry K. Nathan method (to replace only the 243 kext already present on the BaseSystem with ULFO compression)

If script worked you should notice in this folder /Volumes/USBInstallerBigSur/BaseSystem/

a patched BaseSystem.dmg size 850 MB (size reduced through the ULFO compression) and a BaseSystembackup.dmg size 884 MB .

(It's advisable to use a 32 GB USB for an USB BigSur Installer, considering that only the installer app zlib compressed currently is 12.88 GB, but I made another fix for those who use a 16 GB USB)

In case of non working the script is harmless for any Mac .

(Note you can also get a backup of stock BaseSystem.dmg from BigSur Recovery:
diskutil mount Recovery ; open /System/Volumes/Recovery/ )

The script is in two parts because I can't find a way to eject only the shadow BaseSystem.dmg to allow the ULFO compression on the same USB drive, so after first part you should unplug and plug your USB BigSur Installer, then continue with second script .

edit:
fixed it should work now, launch it directly from BigSur Beta3 normal booting to make a patched BaseSystem.dmg for an USB BigSur beta3 Installer to use legacy USB input output devices and Wifi too
(this version requires an USB BigSur Installer on an USB drive greater than 16 GB ).

edit2:
I made another fix for those who use an USB drive less than 32 GB for the USB BigSurInstaller, use the BigSur 16gb BaseSystem fix.

(this new fix can be used also from 32 GB USB)
Thank you jackluke.
BigSur USB installer can now boot on a MBP5,2. Applied your 16GB version to a USB device after createinstallmedia.
 

furdi

macrumors newbie
Jun 13, 2019
19
25
Bucharest, Romania
SUCCESS! Big Sur beta 3 on iMac late 2013 (iMac 14.1)

I have used the old method, csrutil disable from recovery passing from @jackluke opencoreloader3, then using @ASentientBot very simple installer with hax3. After installation all works perfectly: acceleration, wifi, bluetooth, internal sounds in and out and it is REALLY FAST on a Samsung T5 external SSD. Now I can test all the options and 3th party softwares. Its really a shame that Apple doesn't support it officially.

To all Big Sur on Unsupported mac forum users: Just tell me if you need help to patch this 7 years old Mac!

Thank you very much @jackluke and @ASentientBot I'm available for all test you could need to help others to fix issues, also for the Mac mini 2010.
Can you give a step by step on how to proceed? I have a MBP mid 2012 with Big Sur Beta 2 on it. Much appreciated!
 

jackluke

macrumors 68030
Jun 15, 2018
2,937
6,724
Thank you jackluke.
BigSur USB installer can now boot on a MBP5,2. Applied your 16GB version to a USB device after createinstallmedia.
I made a simple additional fix using the ASentientBot HaxLib.dylib to use (without usbopencore) a stock createinstallmedia USB BigSur Installer (patched from BigSur beta3 with BigSur 16gb BaseSystem prelinkedkernel fix.zip) to allow legacy USB mac to install through Utilities "Install macOS", unzip this attached (copy the two files on the USB without the subfolder) on the root of the USB BigSur Installer, then boot from the USB Installer (patched with BaseSystem fix), open terminal and type:

Code:
cd /Volumes/I*/

sh Hax3.sh

or

/Volumes/I*/Hax3.sh
close and from Utilities menu open the "Install macOS" (the circle BigSur icon), now volumes should be selectable and legacyUSB mac eligible to install or update a BigSur installation (credit to ASentientBot for HaxLib.dylib).

For non-APFS mac I guess they still need to use USBopencore to continue the stage2 installer "macOS Installer", while also APFS but legacy USB mac should use this method to install or update BigSur on internal SATA disk (because if you are updating an external USB disk I guess the SharedSupport.dmg on stage2 will copy a stock BaseSystem again or maybe not).
 

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MacStory3

macrumors member
Jun 28, 2020
49
86
I know this is unrelated, but I can't download ANYTHING from Safari. Either the download doesn't start, or it starts and then terminates because the "network connection was lost". I reset my router, tried everything in the book, but I'm really upset because I can't download the macOS installers. Browsing is just fine, just downloading. I unfortunately don't have any other browsers...
 

MacStory3

macrumors member
Jun 28, 2020
49
86
Edit
I know this is unrelated, but I can't download ANYTHING from Safari. Either the download doesn't start, or it starts and then terminates because the "network connection was lost". I reset my router, tried everything in the book, but I'm really upset because I can't download the macOS installers. Browsing is just fine, just downloading. I unfortunately don't have any other browsers...
: found google chrome in a different user. Same deal.
 

hvds

macrumors 6502
Sep 1, 2017
283
601
Switzerland
I made a simple additional fix using the ASentientBot HaxLib.dylib to use (without usbopencore) a stock createinstallmedia USB BigSur Installer (patched from BigSur beta3 with BigSur 16gb BaseSystem prelinkedkernel fix.zip) to allow legacy USB mac to install through Utilities "Install macOS", unzip this attached (copy the two files on the USB without the subfolder) on the root of the USB BigSur Installer, then boot from the USB Installer (patched with BaseSystem fix), open terminal and type:

Code:
cd /Volumes/I*/

sh Hax3.sh

or

/Volumes/I*/Hax3.sh
close and from Utilities menu open the "Install macOS" (the circle BigSur icon), now volumes should be selectable and legacyUSB mac eligible to install or update a BigSur installation (credit to ASentientBot for HaxLib.dylib).

For non-APFS mac I guess they still need to use USBopencore to continue the stage2 installer "macOS Installer", while also APFS but legacy USB mac should use this method to install or update BigSur on internal SATA disk (because if you are updating an external USB disk I guess the SharedSupport.dmg on stage2 will copy a stock BaseSystem again or maybe not).
MBP5,2: the HaxLib works well together with the USB BigSur installer, patched already with your BigSur 16gb BaseSystem prelinkedkernel fix.
USB installer boots fine, then Hax fix applied, then BS installation (to a USB ssd) proceeds fine to the end of phase1.
Thanks again jackluke!
 

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furdi

macrumors newbie
Jun 13, 2019
19
25
Bucharest, Romania
I made a simple additional fix using the ASentientBot HaxLib.dylib to use (without usbopencore) a stock createinstallmedia USB BigSur Installer (patched from BigSur beta3 with BigSur 16gb BaseSystem prelinkedkernel fix.zip) to allow legacy USB mac to install through Utilities "Install macOS", unzip this attached (copy the two files on the USB without the subfolder) on the root of the USB BigSur Installer, then boot from the USB Installer (patched with BaseSystem fix), open terminal and type:

Code:
cd /Volumes/I*/

sh Hax3.sh

or

/Volumes/I*/Hax3.sh
close and from Utilities menu open the "Install macOS" (the circle BigSur icon), now volumes should be selectable and legacyUSB mac eligible to install or update a BigSur installation (credit to ASentientBot for HaxLib.dylib).

For non-APFS mac I guess they still need to use USBopencore to continue the stage2 installer "macOS Installer", while also APFS but legacy USB mac should use this method to install or update BigSur on internal SATA disk (because if you are updating an external USB disk I guess the SharedSupport.dmg on stage2 will copy a stock BaseSystem again or maybe not).
Hi! I followed what you said here. but. I think I. missed how to patch the installer with Big Sur 16GB BaseSystem. prelinkedkernek fix.zip... Can you advise? Thank you!
 
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jackluke

macrumors 68030
Jun 15, 2018
2,937
6,724
Hi! I followed what you said here. but. I think I. missed how to patch the installer with Big Sur 16GB BaseSystem. prelinkedkernek fix.zip... Can you advise? Thank you!
For an Ivy Bridge Mac you don't need a patched BaseSystem (it's only for legacy USB Mac), just set from a macOS Recovery:
Code:
csrutil disable
nvram boot-args="-no_compat_check amfi_get_out_of_my_way=1"
Reboot from USB Installer then use the Hax3 (ASentientBot method) directly from the installer.
 
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