SD card slot on iMac
I upgraded to Monterery OS yesterday and shut down after installation. I re-opened the iMac this morning to discover that the SD card slot does not work. I also tried my husband's Apple USB C to SD card reader but that wouldn't work either. I checked various SD cards to make sure none were faulty and the result was still the same: no card opened. Any ideas how to solve this one please?
iMac 27″ 5K, macOS 12.3