Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Does NOT work with a Mac.

Although NEVER mentioned in the product description, Garmin GPS units in this general category are NOT Mac compatible. They work ONLY with Windows. For such a well-known brand, this is surprising and extremely inconvenient. The ramifications of this are that the GPS works fine in the field, but waypoint transferring and mapping must be done on a PC platform. Don't have a PC? You're out of luck. Something I wish I had known before spending several hundred dollars on the receiver.