Uninstall the PS Plug-in Driver on a Macintosh.
The [Printers & Scanners] screen is opened by clicking the Apple mark and selecting [System Preferences] from [Apple Menu].
The selected printer is deleted.
KOI14000J.ppd
KOI14000_.ppd
Drag the below files from [Library] - [Printers] - [KONICA MINOLTA] and drop them in [Trash].
pstoKOIC14000
KOIC14000.plugin
KOIC14000.icns
KONICA MINOLTA C14000 Printer Driver x86_64 Preferences
The file above may not be displayed depending on the driver setting.
[User Name] is set to the account selected when login.