And this problem is reproduced by the simplest demo I've built using the latest XCODE build, so it's impossible to say exactly what's wrong with my own project. So I would like to know how to fix this problem. And I saw a similar problem on the forum, https://forums.developer.apple.com/forums/thread/712076 but unfortunately no solution was given there。

Since the plugin is enabled in the extension's settings panel, it doesn't really do anything. So I tried to run the plugin binary directly. path as: {my-app}/Contents/PlugIns/{my-finder-appex}/Contents/MacOS/finder The output of a normal direct run is An XPC service cannot be run directly. But what's unusual is that its output is illegal hardware instruction Then the system's Console.app shows its crash report