My mac is still trying to connect to an old Time Capsule that doesn't exist anymore.
I went to Finder -> Go -> Connect to servers and could see the old TimeCapsule server address:
(It was not listed in the favorites box however)
Running OS 10.12.1
Details: A year ago I had a time capsule set up with my mac. I had my iTunes library on there but the stress killed the hard drive in the Time Capsule. I have since done away with the TimeCapsule but my mac continues to search for the server.