There is nothing bizarre on this part of the posting linked above:
Alternative instructions for unblocking TripleA:
1. Open up “Gatekeeper”
Gatekeeper options are found in Apple menu > System Preferences… > Security & Privacy > General tab under the header “Allow applications downloaded from:”
2. Change “Allow Applications Downloaded From:” to “Anywhere”
3. You should now be able to open and use TripleA (and any other software).
Did you try that?
Also be sure to have the latest version of the Java Runtime Environment installed.
I don’t know which version comes preinstalled with your OS.