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. 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. 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.
Mac Os Big Sur On Unsupported Mac
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.
Remarks
Mac Os Big Sur On Unsupported Mac
- Erase/format the MAC HD/SSD before installation !! I really think that this does it more simple for the installer !!
- 'Mac OS Extended(journaled)' with an old non SSD HD
- 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 !!!