Mac recently dropped support for Intel-based apps, you can either install Rosetta or reinstall from the website using the non-intel version. This may or may not be your problem.

I'm not saying it's inaccurate, but early, that's why I proposed to leave both, and wondered if techs should visibly upgrade units. It could well be that Spartans and Athenians wouldn't have this tech (I've mentioned lots of techs in Thoughts on the Spartans that wouldn't apply to them just because currently related ones do), if their focus is only the Classical period (which is a bit funky when also fighting Hellenistic civs, but ok). After all, "the new torsion weapon does not seem to have reached fruition until the middle of the 4th century", and by the 330s BC "the torsion catapult had already appeared elsewhere, and scholars have assumed that its testing ground was Macedon, kingdom of Philip II and his son, Alexander the Great", from Campbell. Good to know the Polybolos has somehow been considered (I just play one civ at a time for months, have gone through Spartans, Athenians, and now with the Macedonians). Still, the torsion spirals seem the most pressing blunder to fix, since that's not only incorrect, but physically impossible (hoplites with rectangular shields would make more sense ).

The tension design is imo not that inaccurate for the Spartans and Athenians, they seem more focused on an earlier time frame. Now for the Hellenistic civs it would be (BTW i just noticed the Seleucids seem to have no bolt shooting artillery). Polybolos is already in game, but only for Ptolemies.  

Maybe try clearing the caches folder for 0ad, that might help. Did you restart after upgrading? If that doesn't work, maybe try reinstalling 0ad

I just upgraded my Mac from Sequoia 15.8.1 to 15.8.2 (so not a massive jump), and now 0AD starts with a black screen. It's 0AD 28, and worked fine before that.   I can see the arrow pointer (0AD's stylized spearhead), and if I manage to click in the right place, I can hear the click sound. I can also hear the music.  I tried clearing the Application Support folder with all the config files, but that didn't help. Any thoughts?  Thanks