Garmin Edge 1050 does not appear on Finder menu on Mac

Hello,
when I connect the Garmin Edge to my Mac computers (iMac and Macbook Air), the Garmin does not appear in the Finder but is recognized by the computer's Garmin Express (because I was able to do all the updates from from Garmin Express on my Mac computer).
So I can't access the Garmin hard drive to enter all my recorded routes.
However, I updated the firmware: Software version 9.09.
What can I do to make my Garmin Edge 1050 appear in my finder on Mac?
It’s a shame for a counter of this price.
Thank you for your prompt response,