Garmin ANT+ Users

If you have Garmin ANT+ Agent for Mac installed on your computer, you must delete the Application prior to attempting to install Snow Leopard. The Snow Leopard install will fail after the first reboot (leaving you with a completely fine, but un-upgraded OS) as it needs you to deal with Garmin's request that you download new firmware and hardware. If you drag Garmin ANT Agent to the trash, and restart the install it will work fine and then you can attempt to download the new version of Garmin ANT Agent.