This article covers unexpected Battle.net Update Agent errors.
Battle.net is unable to find your game installation in the directory selected.
Many common hard drive or OS problems on a Mac can be resolved by running Repair Disk.
What to do if you receive this error when adding your phone number to your Battle.net account
If you encounter a bug in one of our games, please report it to us.
Failed to download a required update. Please check your internet connection and try again.