Following the description from https://developer.apple.com/documentation/xcode/embedding-a-helper-tool-in-a-sandboxed-app* I successfully managed to run my app sandboxed on my development system. Nevertheless the copied application refuses to call the external tool unless it is compiled with NO for the App Sandbox entitlement.
My app can be downloaded from: https://github.com/mac-curver/Postscript-Playground The last commit is using the App Sandbox entitlement but the commit before is not using it like compiled and zipped app in the Application folder on Github. The attached picture shows, running the sandboxed app on my development machine. Why the sandboxed does not run on other MACs? How could I test this?
*P.S. I could not exactly execute all tasks as written in *, for example I require OS 13.0 and I am using a non commercial dev account (not paying for it).