that would seem to be a Mac OS issue. Perhaps
https://discussions.apple.com/thread/7282309?start=30&tstart=0 for an earlier
version of OS 10 might help. If not, suggest you post in the Apple Mac forums
and ask about Bluetooth issues with a bluetooth keyboard. This would not be
specific to the Surface bluetooth keyboard AFAIK.
>> I'm using the keyboard with MacOS Sierra 10.12.2.