External hd not showing on desktop
I have 2 imac 27 computers, I use the one for all my functions, the other has some info stored on it along with 3 external hard drives. For the computer I use all the time I got a new Seaquest 2 T for additional back up. For many years I have added external drives to my computers with no problems, I connected the new one to my main computer, went to Disk utility and it doesn's show up there, So, I unpluged it and then hooked it up to my older computer and it shows up, I was able to even change the name of the hard drive and just for checking, added an image to it, so I then unplugged it and then re connected it to my main computer, I doesn't show on my desktop and when I go to Disk utility it is not there, My current imac is 0s 11.17.1
The older one is 10.13 any suggestions?