There are fewer and fewer reasons to connect a Garmin device to a PC or Mac these days. It used to be needed for adding routes, copying workouts, updating software and updating maps but now all of those things can be done over WiFi or via a phone.
One stubborn holdout though is transferring screenshots.
Garmin please automatically copy screenshots to the phones photo library when syncing. This is particularly important for reporting bugs, and will help them to be resolved more quickly.
