I'm not entirely sure how useful an automated tool like TechWARU would be for Mac repairs. Having everything in one place, and the reporting would be nice however.
Currently the normal procedure for Mac repairs is to use Sophos Antivirus (I still haven't tried Malwarebyte's new Mac client), Adware Medic (which was recently purchased by Malwarebytes), and Onyx to do a bit of a tune up. Manually I reset all the browsers, verify and repair disk permissions via Disk Utility.
That's it. Rather lackluster, I know.
There are so few decent software tools to use that I'm not sure if a TechMARU is necessary at this point. It would be awesome though.