thunderbolt hardware not found
tried plugging something into my thunderbolt port and its not picking up the signal. I went to system and when I check the thunderbolt tab to see if anything is plugged in it says thunderbolt no hardware found. I have tried everything to resetting pram and unplugging back and forth. The second monitor works on other apple products I have but not my main desktop. imac 2013 27
iMac 27″, macOS 10.15