I’ve bitched before, but only in a general sense, about the GPL licenses in installers. Specifically, I should not be required to agree to the GPL to install a piece of software. Personally, I feel that once I have a piece of software, I shouldn’t have to agree to anything to install it, but that’s a different story.
The GPL is explicit about the fact that you can do anything with the software once you have it, because it doesn’t cover use. It covers distribution, so if I don’t give the .dmg to anyone else, I don’t need to agree to the GPL.
I also want to mention this fantastic groklaw article here, about the GPL, because it’s great.