Garmin Edge 840 does not connect to Garmin Express

I just received the device today. It synced with the Garmin Connect on my iPhone automatically and asked for software upgrade. Then I wanted to connect it with Garmin Express on my mac, but it won't find the device. I use the latest Garmin Express 7.24.0.0 and Software version 24.55 on the Garmin 840. I have other Garmin Devices connected to this machine OK, i.e. - Edge 830, Forerunner 920XT, Varia Bike Radar, and Garmin nuvi. All devices work OK via USB. Any idea what can be wrong with the 840?

Top Replies

zarmapi 12 days ago +5 verified

How to connect the Edge to a Mac PC. (after new release 24.25)
1- Garmin edge off
2- Connect the USB cable to the PC, HOLDING the LAP button. 
3- WAIT at least 20 - 30 seconds until USB MTP MODE appears…

All Replies

0 aweatherall 23 hours ago in reply to Martin Borsje

Mac's are limited to only one program talking to an MTP device at a time. Do you having any other MTP program running at the same time as Garmin Express. E.g. OpenMTP

0 Pai2Uk 15 hours ago in reply to Pai2Uk

Update from my side: Tried to connect again today and having same issues as other users. Garmin Express is not seeing device in USB MTP mode. no green light and search not finding the device. No other MTP software running like openMTP

I disconnected all the external drives again (Not sure this is related ?)

Rebooted Mac

Once it restarted, put the device into USB MTP mode

Opened Garmin Connect

Everything is working now as expected and I checked I could add/remove maps.

(Note to Garmin, after the maps are updated, the connection is lost and you have to power cycle the device and re-enter USB MTP mode again to continue)

Firmware 25.25

OSX 15.2