I have lost more than a few hours of work trying to get my files to sync since the last update (Version 16.x). One Drive was rock solid and now it won’t even allow me to type while it endlessly spins its gears. I have uninstalled it from my system and flushed the trash. It is time to find something that will work. I guess Google Drive or iCloud. To Microsoft I say shame on you. Update (June 17): I tried version 17.3.xxx in hopes that things have improved. This was it for me and I have moved on to Google Drive. The program just does not work with the MAC well at all. I am using the latest version of El Captian which seems to be when my problems started. I still have One Drive installed on my Windows 10 PC. It works seamlessly there, unfortuneatly all of my critical files are no longer available on One drive. It is with a heavy heart I say that I cannot recommend One Drive for the MAC. (Too Dramatic?)