I can't use Garmin Express on my macOS Tahoe 26.6.2 to sync my Garmin Forerunner 955. I need to know whether or not Garmin Will update the Garmin Express app for macOS Tahoe 26.6.2 and later.
I found a solution: The issue was the Rosetta/permission/background-service environment, which prevented Garmin Express from completing its device handshake; so in macOS 26, on terminal
softwareupdate …
7.29.2.0 is compatible with Tahoe.
Another user had an issue and Garmin's suggestion was to remove and reinstall Garmin Express.
There has been no answer from the user.
I found a solution: The issue was the Rosetta/permission/background-service environment, which prevented Garmin Express from completing its device handshake; so in macOS 26, on terminal
softwareupdate --install-rosetta --agree-to-license
That command installs (or verifies) Rosetta 2.
The permission adjustment was separate—it was done through System Settings → Privacy & Security.