Grub

Ytied to install kubuntu on usb. As 2nd boot device on Mac Pro 27”

now only boots to grub and of course no BT so no “magic” keyboard”,

stuck now ar grub. Thought ok use startup disk. Nothing except startup stuck with no manual eject pinhole. Second design flaw so far.

this is crazy. Two design problems and I’m stuck.

no screws to even take the apart! I’ve built over24 pc’s asa hobby.

suggestions. Will a usb keyboard work.

thanks drdave