MacTEX installs TEX Live 2010 in /usr/local/texlive/2010. The distribution it installs is exactly the same as the distribution that would be obtained by using TEX Live’s standard install script.

I'm having the same issue as dixius99 when I try to install MacTex 2011 on my MBP in Lion. The md5 of the download checks out, so that's not the issue. Here's the error: 4/2/12 9:58:43.853 PM ...