As Garmin Basecamp is pretty much unusable for any normal Mac user (and don't get me started on the flaws, it would take too much of my precious spare time to list them), I'm looking around for a software I can use for archiving tracks.
So far, the one I have found that might work for me is rubiTrack.
I just started playing around with it and it is more targeted for runners and bicyclists, but it might be good for keeping track of some interesting tracks from motorcycling, too.
Here's a nice screenshot (click the image for a larger view):
It also seems to work directly with my Garmin GPSMap 60CSx. I'll use it for a while and report back, but it looks promising so far.