I have a case sensitive drive on my macbook. I went to install Illustrator but I got the error that it can't be installed on a case sensitive partition (in 2013!!!). I went and partitioned my paltry 128 GB drive and made the new partition case insensitive. After that I tried to install Illustrator and again, same error. It didn't even bother to look to see if there was a new drive. Are there any command line switches or anything I can use to force it to install on the new partition?
From the description: "adobe_case_sensitive_volumes is a function call hijacking library that forces volumes to look like they are case insensitive."
It's pretty hacky, involves creating a sparse bundle and some symbolic links to trick the installer into thinking that it's writing to a case-insensitive volume. But it does look like it was designed to solve just what you're trying to do.
See also this article on a more drastic solution (directly hacking the installer).