Equipment: Brother MFC-8890DW and Brother MFC-9320CW

I suspect it will work on: All older printers with Big Sur!

On upgrade to Big Sur, I found that my 8-year old expensive Brother MFC printers would no longer work, and that Apple was recommending that we use AirPrint. I could install the printers using [macOS v10.15](https://en.wikipedia.org/wiki/MacOS_Catalina) (Catalina) (or older) drivers, and my scanners would work, but not the printers! AirPrint would not work either.

I scoured the web for many hours and tried 1) Resetting the printer system - no go. 2) Reinstalling CUPS (with SIP disabled and Gatekeeper disabled - no go because of Apple's read-only /usr filesystem ... not getting into setting up remounting the root (/) filesystem because of FileVault problems.

I noticed that this was a problem that everyone was having regardless of their printer brand - indicating that it was a *system* problem.