SuperDuper and crashing system
 

Today when I went to do my normal backup routine, SuperDuper froze about halfway through. I couldn't even force quit, and had to shut down my iMac using the power button on the back.

After restarting, I tried the backup routine (involving two external drives connected by Thunderbolt 2), and had the same result.

Restarted again, third time SuperDuper wouldn't even open. I see the application in the dock, but there is no interface window, and when I click on it nothing happens. I can't send you logs because I can't access the interface. Any ideas?

Sounds like one or more locked up *drives*. Power off the Mac and all devices, fully. Wait a minute or two, then start up again and see if things work.

Thanks. Did what you suggested. This time it didn't crash my system, but I got an error. I sent the log to you.