I am trying to use the XYtools plugin for QGIS (because copy-paste is not working with just one of my files?!), and I'm concerned that I actually just need to update my Python but not sure if doing so would disrupt anything. I've read all the posts on "install python xlw and xlrd libraries" errors, but most instructions seem to be for PC or assume Python version >= 2.7.

I installed QGIS about 4 months ago on a brand new machine running Yosimite, using the "QGIS 2.12 built for Mac OS X Mountain Lion, Mavericks, Yosemite and El Capitan. Built with Qt Cocoa 4.8." The only "Python" I can find on my machine is version 2.6. 

Any help on this is greatly appreciated!