SeaFile Client opening and immediately closing on MacOS Sierra

I give a summary of the problem:

  1. Many users confirm that after upgrading to MacOS 10.12, the Seafile client GUI part stop to work, i.e., the applet icon does not show anymore.
  2. Users confirm that a new installation of Seafile client on MacOS 10.12 works provided that this computer has never installed Seafile client before.

Can anyone confirm that the following steps can’t solve the problem (the first 3 steps should clean all the files that Seafile client has left on the system):

  1. Open Activity Monitor
  2. Search for “Seafile Finder Sync”, “seaf-daemon” and “Seafile”. Stop all of them.
  3. Remove ~/.ccnet and ~/Seafile.
  4. Then reinstall the Seafile App

Because MacOS Sierra (10.12) was released in Sept. 22th and we have a business trip for a week and then followed a national holidays for another week, so we haven’t looked deep into the problem yet.

For my own Mac with upgraded to 10.12, I haven’t encountered the problem yet.