Hi,
My Macs (iMac and MacBook Pro) do not find the different Garmin devices. However, the devices are charging when the USB cables are connect to both Macs.
Any advice(s) about what to do?
Try reading through this FAQ
https://support.garmin.com/support/searchSupport/case.faces?caseId={6fa1cca0-486e-11dd-6d60-000000000000}