Connected my Forerunner 935 to my Mac this morning, was prompted to upgrade Garmin Express version, and did so.
Device started charging, and sync'ed with Garmin Express in the normal manner
Garmin Express told me I had number of updates, the "biggest" being upgrade to v9.6. Accepted all upsets and it set off downloading & transferring those to the device. Device prompted me to install v9.6, which I did. device installed and reset in the normal manner.
After that process the Forerunner will no longer connect via it's physical port. Even when connected by the cable, it will not charge when plugged into an AC charger, and it will not charge via my laptop when connected to the USB port, and Garmin Express no longer sees it at all. It is as if there is no cable connected, (when there actually is). I have 2 cables, so have tried the alternative one - same problem! Device will still sync via Garmin Connect Mobile (bluetooth connection), bit only for as long as it holds a charge
So, I am now stuck with a Forerunner 935 that I cannot charge, and cannot update via my laptop- THANKS GARMIN, you've played a blinder - back to your old poor quality updates I see!