I have a Canon printer, and 'Share this printer on the network' is checked in System Prefs/Printers & Scanners on my Mac mini running 11.4. I have a few presets saved in the mini's Print dialogue.My MacBook Air will see the shared printer, and now that I've copied over from the mini's Library/Prefs the file
<<com.apple.print.custompresets.forprinter.Canon_MG5300_series.plist>>
to the same location on the laptop, I see the presets listed in the laptop's print dialogue. But they make no difference to what prints.
For example, every time I select one of my black-and-white presets on the laptop, the print is always in colour.
No problem on the mini, which prints as the preset directs.
What's going on? What am I doing wrong?