How can I save my carefully constructed printer presets before I have to re-install my printer? My Brother MFC-L5750DW is refusing to print documents (worked fine this morning), and after restarting, checking for latest software and drivers (currently updating) I suspect it's time to remove and re-add the printer via SysPrefs.

Over the last few months I have carefully saved up numerous printing presets which AFAIK will all be lost when I remove the printer.

I don't want that - what steps can I do to keep these presets - is there a .pref file somewhere?

Anything else I should do first?

OS 10.15.4
Mac Mini (Late 2012)
Printer Driver (and Firmware) updating as we speak (released yesterday)…

Thanks!
Your custom presets are located in

${HOME}/Library/Preferences/com.apple.print.custompresets.plists


Now, it is possible that it may have the printer name "embedded" in the filename.  For instance I have an HP LaserJet that I name "HP Color LaserJet" so for me, my plist has the following name:

com.apple.print.custompresets.forprinter.HP_Color_LaserJet.plist


If you want to see what's in the settings file, just issue the command

defaults read com.apple.print.custompresets.forprinter.HP_Color_LaserJet.plist