Either a Unix command or an API (Applications Program Interface) used in TTP 6 is the most likely culprit. However Micromat NEVER condones using any version of TTP that has not been thoroughly vetted for the upgrade version of OS X you are running. Update versions are generally okay however.
Thanks.
I wouldn't have guessed that anything that changed with a machine upgrade would affect an app's running.
I got the same pop-up when I launched TTP on my 2015 machine as I had previously gotten on my 2010 machine, and the only reason I even tried on either is that it's been posted here (by you, I think) that it was really only the OS X testing portions of TTP that were in question but that the disk testing portions were OK to run.
The new Great Equalizer is the SEND button.
In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire