Demo Runner will not open

That’s odd. All it does it call File::startAsProcess() on the DemoRunner.xcodeproj file. Are you able to open that file manually?

I got a solution from Fabian at info@juce.com “If you are compiling the Projucer yourself, then you also first need to build the DemoRunner project in examples.”

I opened the example projucer for demo runner and build it in my IDE.