2 of my Mac mini USB ports disabled
After connecting my old iMac to my Mac mini using firewire with a firewire-USB adaptor, by usb port was disabled - drawing too much power. I tried both one USB and one Thunderbolt 3 port. I gave up on connecting the iMac, unplugged it. Both ports are now inactivated. How to reactivate them? I reset SMC and PRAM, rebooted, unplugged the mini. All to no avail. Any other suggestions on how to fix this?
Mac mini, macOS 10.15