macOS Sierra and QNAP SMB share - Disk does not support Time Machine backups. (error 45) Quote from macOS Sierra: Disks you can use with Time Machine


  If your backup disk is on a network, the network server can use Server
  Message Block (SMB) file sharing. Your Mac must be connected to the
  SMB server when you set up Time Machine. After you select the network
  disk in Time Machine preferences, Time Machine automatically connects
  to the disk when it’s time to back up or restore your data.


&gt; sudo tmutil setdestination "/Volumes/$NAME/"                                                                                                                                                                                                      
Password:
/Volumes/$NAME: Disk does not support Time Machine backups. (error 45)
The backup destination could not be set.


I use QNAP TS-251 with latest firmware. The SMB share is working fine with Finder.

Any idea? I don't wish to use AFP.

I followed the instructions How do I set up Time Machine backups between my Mac and NAS on a domain via the SMB protocol?. When mounted as SMB it doesn't work, but with AFP it works.
QNAP says it is not supported!