That makes sense, but in the interest of promoting people to download the game (as opposed to driving people away with mandatory registration), you might want to consider alternative methods of distribution.
To those people who have problem with Mac OS X updates (not just this one), I wonder what kind of junk you have installed in your system. I have had literally zero problems with Mac OS X updates, dating all the way back to 10.0.
Looking for $100 + shipping. This was pulled from a Power Mac G5 and I tried to tape the pins to make it work in a G4, but was unsuccessful. I don't have a use for it so I'd like to sell it. PM me with offers!