I know, that's why I can't stop googling for a few mins now.
Ok, this should do the trick:
Download from here:
http://www.speedyshare.com/settings.php?id=906389514&idh=978813094c614794436a80a0d10ffcd2
Extract to here: Mac OS X: /Users/<username>/Documents/Sports Interactive/Football Manager 2011/Skins/
If there isn't any "skins" folder, make one and put it there.
After you do that, start "Preferences" in FM, go to "Display & Sound", choose Galaxy skin (Calendar enable + Team coloured footer), untick "Use skine cache" and tick "Always reload on Confirm". Press Confirm and wait for 30 seconds and enjoy the game.
PC users extract here: My Documents/Sports Interactive/Football Manager 2011/Skins