I have a Garmin Edge 500...picked mine up last March from Pro Bike Kit (a UK outfit) during a sale. I paid $266 for the bundle with cadence sensor & HRM and it's the "neutral" colored one (black/silver) not the original blue one (which would not have gone well with my bike color). I really like "seeing" the route I've ridden on Google Maps when you upload to Garmin Connect...very neat feature. And it works just fine with a Mac (we got one too).

Linda