2012 MBP Retina - mouse losing BT connection at least once a day. Requires a restart of the computer to get it to connect to the mouse again. Turning off/on BT and even deleting the preferences plist file by themselves don't do the job. What a pain! Anyone have any other ideas?
You don't mention resetting the mouse itself, but I assume you've tried that too right? If you can live with it definetly go for the USB adapter because that's very reliable.
For me most connection issues are resolved by either waiting a minute or deleting and repairing the mouse from settings. Still annoying.