AstroImager, a new image capture application by CloudMakers designed specifically for Mac OSX --- supports nearly all Atik cameras. I've had a hell of a time with the Atik 314L+ and 414EX on Nebulosity2 and SkyX, thanks to OSX Yosemite, until this $12.00 alternative came along. It's very stable. Not a single crash. Love it
It also controls my SX USB filter wheel. Again, nil issues. Stable as.
http://www.cloudmakers.eu/astroimager/