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macOS 10.12 (Sierra) Garmin Express Does Not Connect/Sync

Former Member
Former Member
*** Resolved *** Unsure what happened, but reinstalled again and power cycled (again).. now syncs OK.

Hi early adopters,

I'm running up a virtual image of macOS 10.12 GM (the final cut pre-release) and Garmin Express does not sync.

It was working up until the upgrade, and reinstalling the software does not resolve the issue.

I am getting the error after attempting to sync of "There as an error syncing with Garmin Connect".

There appears to be comms to Garmin's CDN (akami) on TCP 443 via a packet dump, but I've no idea what the baseline is meant to look like so unsure if what I'm seeing is normal.

Device: Garmin Forerunner 910XT Firmware: 3.20
Garmin Express Version: 4.1.27.0
MacBook Pro (Retina, 13-inch, Early 2015)
macOS 10.12 (Sierra, latest GM build)

Screenshots also attached.

Let me know if anyone else is experiencing something similar and Garmin Support, if you could assist that would be great.

Thanks.

Russ