Oldřich Vetešník

Hello, thanks for the reply. Sadly it has been almost two years and I don't really remember much about this anymore. I can't look into it in the near future...

Okey, no probs, I'll reopen it. :)

In the mean time I found a workaround: You can still run XP12 via Rosetta (here's how https://www.macworld.com/article/338843/how-to-force-a-native-m1-mac-app-to-run-as-an-intel-app-instead.html) and Xpconnect works fine.