Hi Gunter, MoI version 3 won't run on Ventura because v3 is a 32-bit app and Apple dropped support for 32-bit apps starting with macOS Catalina.

The last macOS version that can run MoI v3 is macOS Mojave.

MoI v4 underwent a significant rewrite to make it a 64-bit native intel Mac build, so it will run ok on Ventura.

So your options are to downgrade your OS to Mojave or upgrade to MoI v4 to stay with macOS Ventura.

- Michael