I'm having an odd problem, I have a 2017 27" iMac, it comes with a bluetooth keyboard in the box. However, I swapped it out for a wired keyboard as I prefer Apple's older wired keyboards over the new bluetooth ones.
The issue is when the Mac boots the USB (wired) keyboard fails to work until it's booted into macOS. Anything like entering account passwords at the initial login screen or putting the Mac into recovery mode only works with the bluetooth keyboard, it acts as though the wired keyboard isn't even there.
The caps lock key doesn't even light up, it's like the USB bus isn't getting power until after macOS boots.
Is there a solution to this? Is there someway to set the USB keyboard to trusted or something?
Best Answer
I don't know why this is the case, but the USB keyboard does work on boot but only if it's in the second USB port on the back of the iMac. It's the second from the center of the mac, so the third from the outside. Every other USB port doesn't work before the Mac has booted up.
Confirmed with other USB devices as well, that port is the only functioning USB port before I boot into macOS.
It might be a hardware issue with this iMac, I don't have any other 2017 iMacs around me to test.
Thanks for the help guys!