I want to install Adobe CS 6 on an external hard drive but can't select the install location My SSD is formatted case sensitive, so when I attempted to install I got this:


  Installation on case sensitive volumes isn't allowed. Please choose a case insensitive location.


But I can't select the install location.
Not the answer you want, but whatever.

Re-format your SSD to the default of HFS+ case-insensitive. Almost all Mac software is designed to run on a case-insensitive file system and you using case sensitivity is the problem. 

Maybe you'll find a solution here.