I have lightroom CC 2015 that I just purchased a month ago. I have a Mac OS X with the Maverick. Set up a couple collections to use mobile sync which synced with lightroom mobile web site.
After latest Lightroom update, my collections no longer show nor do I have the ability to do any lightroom mobile sync. It used to work. The option is totally gone. Even a brand new collection doesn't even have the option to do Lightroom Sync. When I click my name at the top left and look at the Sync to Lightroom mobile option, it is on. Above my name it has always said waiting for connection which I read is a bug that has been there with Mac OS X forever.
Yes, this is a known issue with Lightroom CC2015.1 release, however you can still revert to CC2015.0 and use the sync option as syncing does work in CC2015 release.
You need to uninstall CC2015.1 and install Lightroom CC2015.0 directly from here :
After installing from this link, you will be able to see the sync option while creating a new collection.
The direct download link might not work in the first go.
So, please open this link first and make sure you are signed in with your Adobe ID :
and then, open the above link for direct download of Lightroom.