Running macOS Sierra Betas and now the GM, I am experiences a problem with my TimeMachine backup to a Synology NAS.
I am getting frequent "Disk is already in use" errors and while investigating I find in the console the following every 3 seconds:
| default | 09:29:49.080179 +0200 | TMCacheDelete | listener: <private> |
| default | 09:29:49.080219 +0200 | TMCacheDelete | Skipping entitlement check... |
| default | 09:29:49.090247 +0200 | TMCacheDelete | newConnection invalidated |
Could it be something like, that TimeMachine keeps the connection, because it (apparently?) cannot delete its cache?
Any ideas?