So, I recently acquired a NEW Mac Mini and reinstalled ALL my software from scratch. I installed clean copies of both Audirvana Origin and Legacy Audirvana 3.5.
In both instances, the applications are continually syncing even after they have scanned and indexed all the albums. At first, I thought it was version-specific, but as it occurs with both, I wiped out the Audirvana folder in the ~Library folder on the Mac Mini and reconfigured both applications.
I decided to be patient, and it has now been more than 2 hours, and they are still syncing. This does not affect the playback of music in any way.
Scratching my head, this is rather odd.