One of the additional tools that I didn't mention in my original review of third-party utilities is actually a native capability in OS X, that is the Unix command line accessed via the Terminal application in /Applications/Utilities.
Where I have found this to be increasingly useful is for late-breaking OS capabilities for which there isn't (yet) a graphic user interface access available.
When I upgraded my Wife's MB Pro 15" to an SSHD, I followed the guidance in the article linked
HERE to enable the trim function for a non-Apple SSHD.....prior to Yosemite 10.10.4 and subsequent OS releases, a third-party enabler was required.
