Mac Os Big Sur Unsupported Mac

  

  1. 去年の最初の記事で、「Catalina 対象外の Mac に Catalina をインストールする方法【Catalina インストール編（4）】」という記事を書いたのですが、Big Sur Patcherのようなもので安定しているものがあまりなかったのと、初心者には難しいであろうことを行う必要があったので紹介はしていなかったの.
  2. Patched Sur is a UI patcher for macOS Big Sur, designed to make it easy to run macOS 11 on unsupported Macs. This patcher hopes to allow any user of any knowledge to patch their Mac, while still giving you freedom on how you want to use your Mac.

How to install Big Sur on unsupported Mac To install Big Sur on an unsupported Mac, you must first create a bootable USB drive using a special patcher app. Then you need to use the USB drive to install Big Sur on the unsupported Mac, and, lastly, you must install the needed patches. Creating a bootable USB stick using the Big Sur patcher. Nov 15, 2020 Unsupported Macs supported by ‘Patched Sur’ First of all, make sure that your Mac is not in the official macOS Big Sur list of compatible Macs.At the time of writing, the following Macs are.

You are probably aware that this fall, like every single fall season, the pumpkin spice latte new macOS version will be available to install. However, this year, Apple chose to do things differently.

macOS Big Sur

First thing first, the version number. Yes, we are now looking at macOS 11, after roughly 20 years of macOS 10/Mac OS X incremental updates. Why change now? Well, with the release of this new version which will be available on Apple Silicon-based Macs and which introduces a totally new design, Apple taught it was time.

Weirdly (not really), I tend to agree with that. Indeed, I've now spent most of my life on version 10. That makes me think I still have the CD for Mac OS 9 somewhere and that I should take my first computer ever — the iMac G4 from 2000 — for a spin sometime... just for fun.

Yet, that is not the only thing Apple decided to innovate on: making perfectly working older Macs obsolete seems to be one of the new features brought by this version. Yikes.

My iMac late-2012

I am actually writing this article on this iMac. Yup, that's an eight years old device still standing perfectly here — accounting for the external SSD I'm running macOS from. I can remember myself saving the money for it for years and then finally going to the store with my mother, picking an iMac from the aisle, buying Microsoft Office like a dumba-- with it and unboxing it at home... with no Internet connection whatsoever. Anyway.

The fact is, this machine has serious specs that are still relevant to this day. Indeed, my iMac is equiped with:

  • an Intel Core i5 Quad-Core @ 2.7 GHz;
  • 8GB of DDR3 RAM @ 1600 MHz;
  • a 128GB external Samsung M.2 SSD connected via USB-3 with macOS installed on it;
  • an NVIDIA GeForce GT 640M graphics card with 512MB of VRAM (yes, yes, NVIDIA graphics, in a Mac, what a world).

I was then rightfully persuaded while watching the WWDC20, with my specs in mind, that my Mac, will, once again receive this new version, as it did with macOS Catalina. But oh boi was I wrong... Several hours later, articles started to pop out of nowhere saying my iMac (in addition to my Apple Watch Series 2 and AirPods 1st-gen) was now obsolete and stuck on macOS Catalina.

Unacceptable (!), I taught. But then, I remembered that some people were running the current version on already obsolete machines. So I began to search... and was I reassured by the dozens of Mac-afficionados already running the macOS Big Sur beta1 on their unsupported MacBooks and Mac Minis.

The trick

Well then, with all those people already installing the beta on their unsupported Macs, I started to work on it for mine. Without spoiling you the ending, I was not expecting for it to work as well as it does (remember, I'm using it right now).

The basic principle of this 'hack' is to disable the verification of the system done by the installer and ideally force the installation by disabling some security aspects of macOS and adding a new library in the process that will help us achieve our goal.

If you follow very simple instructions, the end of the installation is pretty straightforward: in fact you will in the end be doing the same thing you would have been if your Mac had been compatible to start with.

Those additional steps done, some reboots, and an hour elapsed... et voilà! You are now rocking the last version of macOS (still in beta, remember) on your obsolete system.

As you can see in the screenshots above, first, it's really late, and second, everything works like a charm. From Maps, a Catalyst version of an iPad app, to the new System Preferences... all is great, great is all! The revamped notification center and widgets section, as well as the new control center are also all there for us to enjoy... without having spent any more money on it.

Let's get right to it then!

The catch (and how to fix it)

Before we go, you should know that your mileage may vary depending on which device you are following this tutorial with. Indeed, while some of them will have everything working as expected, most of them will lack support for Wi-Fi on macOS Big Sur...

Not to worry, though. The Mac community and the wonderful people participating on the MacRumors forums have seen worse! This is nothing a little patching can't fix. I'd like to thank libneko, jackluke and Andrey Viktorov for their insightful contributions on how to fix the Wi-Fi and his experience. I wouldn't have macOS Big Sur and working Wi-Fi on my iMac if it wasn't for them and other members of this forum.

In such manner, you'd be happy to know that my iMac is ready to roll on the latest version for at least another update cycle — with all functions working properly. If you too, you are experiencing the failed with 66 error or want to fix you Wi-Fi on macOS Big Sur, make sure to jump to step 10 or follow the entire tutorial below.

Also, just a little reminder that this tutorial is intented for Macs that are currently running macOS Catalina (10.15).

November 17th: Since the official launch of macOS Big Sur, more people are trying to follow this tutorial that was previously meant for the beta version. Thanks to some of you who gave me feedback by email, you might have some more luck with the Micropatcher if the following tutorial fails... Stay safe everyone!

Tutorial : macOS Big Sur beta 1 installation and Wi-Fi fix via kernel extension modification

Edit July: now that beta 2 and 3 are out, this tutorial and some links might not work anymore. I'll try to update the article with the final release so your mileage may vary.

Step 0: being aware of the risks

Mac os big sur unsupported mac wifi

If you are not comfortable with Linux or the Mac terminal, please do not attempt this tutorial. If you attempt this tutorial only to make your Wi-Fi working on your already working macOS Big Sur partition, do not do it also if you are not very comfortable with a Terminal as it may completely break your system. Wait for a better solution or buy a cheap Wi-Fi dongle on Amazon instead.

Step 1: downloading the beta

Since your Mac isn't officially supported, the update will not be showing on your system, even when enrolled in the beta program. You'll need to download the special package directly from Apple CDN, here (9.56GB).

Step 2: downloading the additional library

We need to inject an additional library named Hax.dylib during the installation process. You need to download it here (32KB).

Step 3: moving the library

To make it easier later (when we will use the $PWD variable in the Terminal), use the Finder to move or copy the library to your home folder. In my case this is /SAMSUNG SSD/Users/juliensatti/.

Step 4: booting into recovery mode

Before actually installing macOS Big Sur, we need to disable the system compatibility check layer, disable the system integrity protection (SIP), disable the verification of the libraries and, only then, insert our Hax.dylib in an environment variable.

To achieve all that, we first need to BOOT into recovery mode. Simply restart your Mac and immediately hold the CMD-R keys on reboot until you see the recovery OS.

Step 5: disabling SIP

Run csrutil disable in the recovery Terminal accessible in the menu bar under Utilities. You will also be able to check the success of the command, back in Catalina (so, after a reboot), by running csrutil status (optional).

Step 6: disabling compatibility check

Run the following command in the previoulsy opened Terminal in recovery mode: nvram boot-args='-no_compat_check'. Nothing should show up if successful.

Step 7: disabling libraries validation

First, REBOOT your computer into recovery mode (step 4). Then, open a new Terminal from there and run this long command: sudo defaults write /Library/Preferences/com.apple.security.libraryvalidation.plist DisableLibraryValidation -bool true. If you get an error regarding sudo, try the same command without it.

Step 8: inserting the additional library

From the same Terminal, execute launchctl setenv DYLD_INSERT_LIBRARIES $PWD/Hax.dylib. This command will add the Hax.dylib library in your home folder as an environement variable.

Step 9: installing macOS, finally

To proceed with the proper installation of the system, REBOOT your computer in macOS Catalina (your original partition). Then, open the InstallAssistant.pkg package that you downloaded on step 1.

At the end of the process, a new app will be installed in your Applications folder (you can find it via Spotlight): Install macOS Beta.

IMPORTANT: If the computer on which you will be installing this version of macOS is not capable of a wired Ethernet connexion and if you do not have another computer on-hand, please also follow step 11 to 13 right now as you may not have a working Wi-Fi right away after the install.

The only thing left to do is to run this new application, select your target partition and wait

Please note that during the launch of the latter app it may seem stuck. It is not, the whole macOS Big Sur OS is being unzipped in the background, please wait. Additionnaly, you can check this by opening the Activity Monitor.

Once the OS is prepared to be installed, click 'Restart' and you should be on for dozens of automatic reboots. Wait for the installation to proceed, give it time.Some time later, you should now have macOS Big Sur beta1 installed on your obsolete Mac. Congrats!

— At this point your Wi-Fi should or should not be working —

My Wi-Fi is working

Great! It's over. Glad I could help! Updates should be arriving in the system preferences, as usual. Don't forget to enroll your Mac to the beta program to receive future betas along the way...

My Wi-Fi is not working

Well then, we have work to do. Be sure to know what you are doing. If you are not but still feeling lucky (and totally aware that you can break your whole system in an instant), then proceed to the steps below:

Step 10: testing the system

In order to make your life easier, try to run the following command from a macOS Big Sur Terminal: sudo mount -uw. If no error is returned as a result, please follow this tutorial from ASentientBot or this one if it still does not work, from libneko. Else, carry on.

Step 11: downloading an older version of the Wi-Fi kernel extension

An older kext (kernel extension) named IO80211Family.kext is necessary in order for the Wi-Fi to work. You can download it here (8.6MB, 20.5MB unzipped).

Step 12: creating the bootable USB

You'll need a bootable version of macOS Big Sur on a USB stick (or an external drive partition, as you wish).

To do this, open a Terminal, make sur that Install macOS Beta is still in your Applications folder and execute the following command by making sure to replace <USB/ Label> with the name of your USB stick or dedicated partition:sudo /Applications/Install macOS Beta.app/Contents/Resources/createinstallmedia --volume /Volumes/<USB/ Label>/

Please note that this command will wipe the content on the volume selected.*

Step 13: copying the extension to the USB

Now that the bootable USB is done with the previous command, you can copy on it the IO80211Family.kext previously downloaded (and unzipped, if not already done).

Step 14: remembering Volume Group UUID and Preboot disk

From a Terminal window running on your installed macOS Big Sur system, run sudo kcditto. Take a picture with your phone of this window as it may come in handy later on.

Step 15: disabling authenticated root

  1. REBOOT to the bootable USB drive of macOS Big Sur.
  2. If you have FileVault enabled, neither the author of the original tutorial or I have tested it, but you should be prompted to enter password for the Big Sur installation.
  3. Open a new Terminal window, from Utilities > Terminal.
  4. Run csrutil authenticated-root disable to disable the authenticated root from the System Integrity Protection (SIP).
  5. REBOOT to the bootable USB drive of macOS Big Sur, once more.

Step 16: mounting the volume

Mac Os Catalina

After reboot, open a new Terminal and:

  1. Mount your Big Sur system partition, not the data one: diskutil mount /Volumes/<Volume Name. Please don't forget to replace <Volume Name> with the name of your volume. Always prepend spaces in volume name with, for example, in my case: diskutil mount /Volumes/SAMSUNG SSD
  2. Remount it as readwrite: mount -uw /Volumes/<Volume Name>
  3. Make a snapshot to restore if something wents wrong:/System/Library/Filesystems/apfs.fs/Contents/Resources/apfs_systemsnapshot -s 'BeforeWifiKexts' -v /Volumes/<Volume Name>

You should see: <Volume Name> on /Volumes/<Volume Name> mounted as a confirmation.

Step 17: replacing the kernel extension (kext)

From the same Terminal:

  1. Navigate to the extensions folder: cd /Volumes/<Volume Name>/System/Library/Extension
  2. Backup current kext: mv IO80211Family.kext IO80211Family.kext.backup
  3. Copy new kext from the USB drive, the latter always being mounted at /Volumes/Image Volume : cp -r /Volumes/Image Volume/IO80211Family.kext ..

Make sure there are no errors at the end of these commands. Nothing should appear, it's normal.

Step 18: installing the kernel extension (kext)

That's where things can start to go wrong, proceed cautiously.

From the same Terminal, run the following command: kmutil install --update-all --volume-root /Volumes/<Volume Name>.

You should see Brcm4360, Brcm4331 and some other kexts in the output. There MUST be no errors when running this command. You can see an example here.

Step 19: creating snapshot and making it bootable

Frpm the same Terminal, once again:

  1. We need to create an APFS snapshot for our volume, running the following long command:/System/Library/Filesystems/apfs.fs/Contents/Resources/apfs_systemsnapshot -s 'WifiKexts' -v /Volumes/<Volume Name>
  2. Then, we need to mark it as bootable:/System/Library/Filesystems/apfs.fs/Contents/Resources/apfs_systemsnapshot -r 'WifiKexts' -v /Volumes/<Volume Name>The only difference between these two commands, is -s after apfssystemsnapshot replaced with -r

You should see Attempting creation... and Attempting tagging... if everything went perfectly.

Step 20: copying updated BootKernelExtensions to the Preboot volume

Well, that's where things went south for me while following a tutorial of my own. I was told to mount the Preboot partition of the disk on which my installed macOS Big Sur is. At Step 1, the Terminal told me this was /dev/disk2s2. However, while executing the right command to mount this partition, well... no partition with this name was available.

My fix was to run in the current Terminal of my USB Big Sur volume the following command in order to list all the disks (and their partitions) connected to Mac : diskutil list. From there, you should look over to a partition named Preboot and make sure it's the right one (if it's not the only one).So anyway, once that was under control:

  1. Mount the Preboot disk with diskutil mount /dev/<yourprebootdisk> (once again, look at the picture you took on step 13, or do what I did above).
  2. Create a backup of Preboot data by:
    2.1. Navigating to the volume: cd /Volumes/Preboot;
    2.2. Listing the UUID(s): ls;
    2.3. Checking with your picture that this is the correct UUID and execute the following command by replacing <UUID> with your UUID: cp -r <UUID> <UUID>.beforewifikexts.
  3. Navigate to the correct folder in Preboot with the UUID we just confirmed: cd /Volumes/Preboot/<UUID>/boot/System/Library/KernelCollections
  4. Copy BootKernelExtensions from your volume to Preboot:cp /Volumes/<Volume Name>/System/Library/KernelCollections/BootKernelExtensions.kc .
    cp /Volumes/<Volume Name>/System/Library/KernelCollections/BootKernelExtensions.kc.elides .

You should not see anything in return if the commands were successful.

We can also note that remembering the UUID wasn't really needed because in my case there were only one install base, but this way you can always verify...

Step 21: final

REBOOT to your installed macOS Big Sur system (the normal one). If you’re stuck on boot after approximately 10 minutes, well, you are in a state I wouldn't want to be in. THe only thing left to do is to reset your whole system via Recovery Mode... else:

  1. Log in (Wi-Fi still should not work, that's normal).
  2. Open a Terminal and run: sudo kcditto
  3. Reboot.

Mac Os Big Sur Unsupported Mac

Congrats! Wi-Fi should now work correctly.

In case something went wrong

Mac Os Big Sur Unsupported Mac

To revert our changes, in the case they haven't entirely broken the system, REBOOT into your mac OS Big Sur USB and open a Terminal:

  1. Make a backup snapshot bootable (notice -r instead of -s):/System/Library/Filesystems/apfs.fs/Contents/Resources/apfs_systemsnapshot -r 'BeforeWifiKexts' -v /Volumes/<Volume Name>
  2. Mount Preboot as listed in step 19: cd /Volumes/Preboot
  3. mv .broken where is your Volume Group UUID4. cp -r .beforewifikexts where is your Volume Group UUID
  4. REBOOT to your macOS Big Sur original system and check. After that, you can try again, but don’t create BeforeWifiKexts snapshot and don’t copy preboot again! It’s meant to be done once.
    · · ·

That's the end of this large tutorial. Thanks again to all the contributors on MacRumors forums for their help... and long live to our Macs! I'll try to update this tutorial to see if the other betas break what we fixed with the Wi-Fi or not. Until then, thank you for passing by! 🤟🏼

Big
· · ·

If you tried for yourself or liked this post, don't hesitate to share this article with people it might interest and please share your taughts below in the comments. 😄

macOS 11 Big Sur is an advanced Macintosh operating system that you can install on your Mac. It has got tons of new features to enhance the user experience, like making safari browser 50% faster, new features of messages, Air Pods improvements, new-design sidebar in mail and photos, widgets in the notification bar, and many more.

Apple announced this new software on 22 June at WWDC. And this time, Apple did a big challenge and released the macOS 11 Big Sur along with iOS 14, iPadOS 14, tvOS 14, and watchOS 7. Meanwhile, Apple highlighted all the new features, changes, and improvements to the current software. You can download this new operating system from various sources now. Unfortunately, some Macs can't receive macOS 11 Big Sur update and they can't install the new operating system. In this article, we will discuss how to install macOS 11 Big Sur on an Unsupported Mac with easy steps.

Part 1: Official List of Big Sur Supported Mac Models

macOS 11 Big Sur Developer Beta is available to download. But you have to check your Mac compatibility first. If you have the below-listed Macs then you don't have to install macOS 11 Big Sur as these models will receive an update for macOS Big Sur automatically.

Imac 2013 Big Sur

  • MacBook 2015 and later
  • MacBook Air and Pro Late 2013 and later
  • Mac mini 2014 and later
  • iMac 2014 and later
  • iMac Pro 2017 and later (all models)
  • Mac Pro 2013 and later

Part 2: Unsupported Mac Models of Big Sur (Not Eligible for Direct Upgrade)

On the other hand, if you have the below-listed Mac computers then you can install macOS Big Sur on those models as they are unsupported officially. You have to do some hacks to let Big Sur running on unsupported Macs.

  • MacBook Air 2012
  • MacBook Pro 2012 and Early 2013 MacBook Pro
  • 2012 Mac Mini
  • 2012 and 2013 iMac

Part 3: How to Install macOS Big Sur on an Unsupported Mac

Before the installation, make sure that you take a backup of your Mac on an external hard disk as you will lose all your data when you install the new operating system. There are several backup software like Time Machine, iCloud, Dropbox, and many more. Once you have taken a backup follow the instructions below to install macOS Big Sur on your unsupported Mac.

Step 1: First you need to download two files from the links below to complete the macOS 11 Big Sur installation on your unsupported Mac.

  • macOS Big Sur PKG installer: https://developer.apple.com/macos/
  • macOS Big Sur PKG install hack: https://forums.macrumors.com/simple-installer-hack-zip.926156/

Step 2: After you have downloaded these two files, unzip the hack and copy the hax.dylib file and then paste it to home folder.

Step 3: Click on Install Assistant.pkg to install required contents to your Mac. Make sure that you have enough space on your hard disk as the file will take 20.1 MB size on your computer.

Step 4: Now go ahead and tap on the Install button to install the software on the disk 'Macintosh SSD'. Once you click the 'Install' button then it will ask you to enter your password. Next, click the 'Install Software' button.

Step 5: Next, you have to boot your computer into Recovery mode. You can do that by pressing Command + R immediately on startup until Recovery option appears. In case if you have no recovery partition, you can press down Command + Option +R to get into Internet Recovery. After that, go to Utilities -> Terminal and type 'csrutil disable', followed by pressing the Enter button on your keyboard.

Step 6: Type the following two commands in the terminal. Once you apply the first command, type your login password, and then input the second command.

sudo defaults write /Library/Preferences/com.apple.security.libraryvalidation.plist DisableLibraryValidation -bool true

launchctl setenv DYLD_INSERT_LIBRARIES $PWD/Hax.dylib

Step 7: Next, run the macOS 11 Big Sur installer app that you installed from InstallAssistant.pkg a while ago. Now click on the 'Continue' button and follow the instructions to complete the installation process.

Step 8: The installation will take about 30 minutes approximately. Once the installation is successful you will see the macOS 11 Big Sur wallpaper on your Mac screen. That's it, you have installed macOS Big Sur on your unsupported Mac successfully.

Follow the above-mentioned method to install macOS 11 Big Sur on unsupported Mac devices. The method is quite easy; you just have to focus on the command line and other installation procedures.

Part 4: Alternative Method to Install Big Sur on an Unsupported Mac

The above tutorial is for users who still have access to their device. However, if your Mac is unable to boot into Desktop or you are using a Hackintosh, then you should follow the alternative method instead. In this part, we will show you how to create a macOS Big Sugr bootable USB on a Windows PC and install macOS Big Sur on unsupported Mac by using that bootable media.

Sur

Step 1: Make a full backup of important files on your Mac.

Step 2: Download a copy of UUByte DMG Editor and follow the instructions to install it on your Windows PC.

Step 3: Insert a USB flash drive into PC and open UUByte DMG Editor. Now, click the Burn tab to get into the new window.

Step 4: You will see three options on Burn windows. Please import macOS Big Sur DMG file into the program and choose the USB drive name. You can also set a new name for that USB drive. And this is optional.

Step 5: Once the setting process is completed, just click 'Burn' button located at the bottom to start burning dmg file to USB on your PC. You should wait about 10 minutes for this task.

Step 6: Plug Big Sur bootable USB on your Mac and press Power + Option combine keys to open Startup Manager. At this stage, you are able to select a booting device. Click on the USB drive and start Big Sur installation process.

This part is mainly for Windows users who want to install Big Sur on an unsupported Mac. The most important step is to create a bootable USB drive.

Troubleshooting:

If your system is showing any error message while installing the macOS Big Sur you can try these methods to fix it.

  • Restart your Computer and continue with the installation.
  • Make sure that your Mac’s date and time is correct.
  • Check your Hard Drive to see that you have enough free space to carry out the installation.
  • Make sure that the version of macOS Big Sur is up to date including the macOs installer
  • Run first aid on your startup disk before installing macOS Big Sur to check any system files are damaged or not.

Summary

Mac Os Big Sur Unsupported Mac

You can see that it is not hard to install macOS Big Sur on an Supported Mac. Make sure that you key in the right command lines which are mentioned above, as typing a wrong command can harm your system. Enjoy the great features that come with the macOS Big Sur on your unsupported device!