Install Macos Big Sur On Unsupported Macs

  1. Install Macos Big Sur On Unsupported Macs 10
  2. Install Macos Big Sur On Unsupported Macs Windows 7
  3. Clean Install Macos Big Sur Unsupported Mac
  4. Install Macos Big Sur On Unsupported Macs Operating System

Click the image file “macOS Big Sur.sparsebundle” and it will mount “Install macOS Big Sur” disk image file on the Desktop. Simply clone the image file to GPT formatted USB (Warning again comes up saying it will not be bootable). For the sake of this exercise, I used a disk name as “xxx”. Cloning finishes. Well friends today I uploaded this masterpiece on how to install macOS Catalina on unsupported computersMore information on the dosdue1 page: http://dosdude1.com/catalina/.

How to Install macOS Big Sur on Unsupported Mac Pro An EliteMacx86 Exclusive Guide - This guide covers a clean installation of macOS Big Sur on Unsupported Mac Pro, unofficially. The guide supports Mac Pro3,1, Mac Pro4,1 and MacPro5,1. Overview Recently, Apple announced their new macOS. Nov 16, 2020 How to Install Big Sur on Unsupported Mac Last week when Apple released the macOS Big Sur, some users reported that they weren’t able to download the latest operating system. But now, according to Apple, you can easily upgrade to the latest macOS Big Sur.

Install Macos Big Sur On Unsupported Macs 10

I'm having an old MacBook Air 4.2, (mid 2011, SSD, 4 Gb memory), which have been running Catalina for quite some time despite that the max OS is High Sierra. I have been using the great work by dosedudes1 and his Catalina patcher.

Unfortunately he didn't continue with patches for newer OS:s, but have helped with a new patcher. This patcher even handles Macs with graphic cards from 2008 - 2011.
Using the patcher i got the mentioned Mac up and running with Big Sur after just over an hour.
Fantastic !!!
Install Macos Big Sur On Unsupported MacsBig
Patcher manual

Install Macos Big Sur On Unsupported Macs Windows 7

The manual for the OpenCore Legacy Patcher is nice and there are also a video that will help you for the whole process.
Create bootable USB

You start with creating a bootable USB with info from this post. Just pick Big Sur instead of the mentioned High Sierra.


Building/installing the patcher

After that follow these instructions,on how to install and use the OpenCore Legacy patcher.

Macs

Clean Install Macos Big Sur Unsupported Mac

Big
Good luck !

Install Macos Big Sur On Unsupported Macs Operating System


Remarks
  • Erase/format the MAC HD/SSD before installation !! I really think that this does it more simple for the installer !!
    • With an old non SSD HD use 'Mac OS Extended(journaled)'
    • With en SSD use 'APFS'
  • The Mac rebooted several times during install.
  • Don't remove the USB until at the very end.
  • If you, like me, have a Mac which need the legacy video acceleration support please note that the Mac have a painfully slow display update before you have applied the 'Post-Install volume Patch'.
  • Updating the Mac from Big Sur 11.4 to 11.5, made the messages.app stop working fixed in release 0.2.4
  • Please note that 'Nightly Builds' are available but are for testing purposes only !!!
  • In TUI '5. Miscellaneous Settings => 1. Set Showpicker Mode:' was set to 'False'