If you mean that your 'wireless usb' keyboard has a USB dongle, and not a bluetooth keyboard, then, yes, some just won't work, as the USB dongle isn't available until you get mostly booted - too late to accept the boot key shortcuts.
Find/borrow/buy a wired USB keyboard. Good to have one for an emergency spare.
Thanks, that’s the issue...it’s not wired.
This is a late-2013 Mac Pro? If yes, you will need to remember the password or you will need to buy a new baseboard.I must have done this years ago and don’t remember. Am I screwed?
That's asking for a firmware password.
You will need to remember what you used for that !
There are easy methods to reset that password, if your Mac is old enough.
Which Mac are you asking about?
Nope. Apple removed all tricks that worked with older Macs.Crap!! I sure hope there’s a way to reset it.