Not working on either of my MACS

I was using an earlier version of Snow Leopard on my iMac and GearSync worked fine but the most recet upgrade killed it (Snow Leopard 10.6.8). The pedometer and Garmin will not show up at all. They work fine on the PC at work. Ive tried different USB cables and two different Macs. Still not working. Will upgrading to Mountain Lion solve this problem? Please help if you can.

bgcyclist about Humana GearSync