This question is similar to How do I set up MacTeX so admin rights aren't necessary?.
I have a Mac at work, and the sysadmins won't give me write permissions to /usr/local/texlive. So, per the instructions in Is there any way to have a LaTeX compiler on a Mac without root access?, I installed my own user-specific version of TeX Live, at ~/Library/texlive/2014, and it is working fine.
Now, I'd like to know, is there any way to tell MacTeX's "TeX Distribution" utility (in System Preferences) about this installation of TeX Live, so that I can use MacTeX with it? If I need admin rights to do this, it would be okay -- I can ask our sysadmins to do this if it's a one-time thing. What I don't want is to be tied to asking them, for example, every time I want to install a new package.