Hi Logitech! I realy like your mx key and use both with Mac and Win OS. The only shortage here - or bottleneck to say - to config the crt, opt and cmd (and in windows crtl, alt, win keys) freely and using in the right way. MacOs is great OS but simply handles this customisation in a very confused way. Help us! Let make it simple and allow this keys freely configurable like the F keys. If the MacOS limits this please call Mr Cook and tell him my whish :) Would be a great step a head!