Tootfinder

not terribly encouraging, this #iMac was purchased off Marketplace with Mint installed, so no one knows the boot menu incantation, but I did try a different USB kbd and THIS time holding Alt and Power brings me to an EFI Boot page, so this is interesting …
and possibly absolves the power button mechanics? Perhaps some other Amazon Basics key command? It need only work once!

#Debian13 loaded #Gnome into the #iMac just fine using the SD reader, set it up, loaded kdenlive etc to later test, created my users, but now a new problem I've not encountered before:
the mouse cursor spontaneously vanishes. I still have mouse control, things highlight on hover, but the pointer icon disappears. Switching windows, switching to tty1 and back, not even changing users! On reboot, not touching physical wires, the mouse has a cursor again.🤔