With the release of Garmin Express 7.19.0, support for macOS versions 11.7and older is being dropped.
Here is a link to download a legacy version of Garmin Express for older macOSES:
https://download.garmin.com/omt/express/GarminExpress_7.18.0_OS10x.dmg
However, we will no longer be investigating and resolving any issues that arise in Garmin Express on OSes 11.7 and older.
The new minimum version supported for investigation is Monterey (11.7) or newer.
Please refer to our FAQ: