I am including a screenshot of Disk Utility, where you can see that nothing appears for the device. When connecting it to the iMac, it spins on, like it should, and the tiny light comes on, but nothing happens on the iMac to actually recognize the device. There is no error to capture in a screen shot, because the device is not recognized at all. Since I submitted my Incident, I have upgraded my iMac to macOS Big Sur version 11.3. Maybe someone else has seen this issue and might be able to help! I’m pasting below all of the troubleshooting steps I performed based on my interactions with WD Customer Support. Since my device reached End of Support in 2013, there really isn’t anything more they can do. I have reached out to WD Customer Support and exhausted all troubleshooting suggestions with them.