Starting in early December, macOS Big Sur Internet Recovery was replaced by Catalina as the newest version available.
UPDATE 01/10/21: Apple has restored access to macOS Big Sur Recovery and it is now available to all compatible Intel Macs again!
Some of the first reports came from MacAdmins Slack members Calvin Cliff, Marcus Ransom and Eric Holtam. They confirmed that only Catalina Internet Recovery was available on Big Sur Compatible Macs. Any Mac that has Big Sur installed on it should be able to boot Big Sur Internet Recovery.
Note: This issue is only for Intel Macs. Apple Silicon M1 Macs do not have Internet Recovery.
How is the macOS internet recovery version determined?
It all depends on what model Mac you have and the keyboard command used.
From Apple
By default, macOS Recovery installs the latest macOS that was previously installed on your Mac.* You can get other macOS versions using one of these methods: On an Intel-based Mac, you can use Option-Command-R at startup to upgrade to the latest macOS that is compatible with your Mac.
Exceptions
If macOS Sierra 10.12.4 or later was never previously installed, you will receive the macOS that came with your Mac, or the closest version still available.
If your Mac has the Apple T2 Security Chip and you never installed a macOS update, you will receive the latest macOS that was installed on your Mac.
https://support.apple.com/en-us/HT204904
If you use Option-Command-R you should get the latest macOS version of Internet Recovery*
- 2013-2017 Mac = Big Sur 11.1
- 2018-2020 T2 Macs = Latest version of OS that is installed. (Example if Catalina 10.15.5 is installed, you will get 10.15.5 recovery) The version is based on the version of BridgeOS Installed.
Another example would be if you have a 2019 T2 Macbook Pro with Big Sur 11.0.1 installed. If you used Option-Command-R you should get 11.0.1 Big Sur Recovery.
Problem – All Macs are now getting Catalina Internet Recovery.
Why did Apple make this change? I didn’t report on this earlier because I figured it was a server side issue. Apple would probably fix it pretty quickly. The problem is it’s been almost a month now. Could this be a permanent change or is Big Sur Internet Recovery still having issues?
MacAdmins forum user gepeto42 had some information to share on this issue.
Apple is aware, they are telling me it is a server side issue that is being worked on right now. No ETA at all, on my side I will try when I get back from Holidays around Jan 4-5.
gepeto42
This sounds like Apple is aware and is working on fixing this issue. I will keep you updated as more info comes in.