Cannot Sync from MAC

Please help us by providing the following info.

Steps to reproduce
1.
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Expected behaviour
Tell us what should happen

Actual behaviour
Mac cannot syn.Deskstop client is not sync.
It always busy.

Client configuration
Client version:
Client operating system:

Server configuration
Operating system:
Web server:
Database:
PHP version:
ownCloud version (see ownCloud admin page):
Updated from an older ownCloud or fresh install:
ownCloud log (data/owncloud.log):

Special configurations (external storage, external authentication, reverse proxy, server-side-encryption):

Server and client version are needed. Also a quick look into your logfiles can be extremely helpful.

Please create a new thread once all infos are provided.