Hi Mago, I know about exposè, but honestly it’s cumbersome: to activate alt-tab I don’t have to move the hands from the keyboard, while to activate exposé I either have to use the mouse or press the F3 key, and then navigate to the window I need… It’s unconvenient.

And to install codecs, that’s exactly my point: you need to install extra software and unofficial plugins in order to get basic funcionalities. Just like you have to do in GNU/Linux systems.

The conclusion for me is that OS X is not this masterpiece of usability, and compared to GNU/Linux it’s not a clear winner IMVHO.