I have downloaded garmin Express and updated it his morning. I use Mac 10.7.5 and Ant stick. The Ant stick does not connect to either my garmin 610 or garmin 10.
We need some more information in order to establish what is happening. Does the Garmin Express show any error messages? Do you have anything else wireless around your computer? Do you have the Bluetooth activated on your MAC? How much data is on either device? Have you tried the Garmin ANT Agent or another computer?