Can not open .jar File on Macbook

I have a new MacBook Air with the M1-CPU. I have installed eclipse and I can code with the IDE, but I can’t open a .jar-File because it is grayed out. My target is, to open the file with eclipse, so …

Opening app on macOS 11 Big Sur from JavaFX application randomly fails with kLSNoExecutableErr

We have a desktop JavaFX application (well, TornadoFX) that downloads an archive, extracts another app from it and launches this app with macOS open command. Simplified kotlin code looks like: …