Beninden says:I couldn't stand the windows app/lack of Mac support for the 405 and dug until I found an amazing program called Ascent for the Mac from Montbello Software. It is amazingly better than Garmin Training Center, and while it doesn't directly support the 405 yet, you are able to export a file from GTC on the windows (Parallels/Fusion side) and reimport into Ascent on the Mac side. For the first time I was able to see what a Mac can truly do with all that data.
Runner+ together with Ascent gives me all I need.
Just wanted to share

P.S. full support for 205/305