Debugging JavaScriptCore with Safari, in macOS app

Question

I have made a simple Hello World app for OSX that creates a context group, a context, runs a script and calls my own function, using the C-APIs, all good.

But what I can't do, is get my app/JSContext to appear in Safari's Inspectable Applications list. (It's just empty)

I can't tell if this is supposed to be automatic, or if I need to enable something in a context, VM etc (Couldn't find any references to being debuggable/inspectable in docs, headers)

This project claims to do it (based on screenshots in the wiki), but looking through the code I couldn't see any specific configuration options, settings etc https://github.com/kasper/phoenix

This answer suggests iOS apps need to be signed... could that be necessary for macOS apps, too? Safari: no Inspectable applications

Using Xcode 10B61, Safari 11.1.2, OSX 10.13.6

Has anyone managed to debug a macOS app with Safari?

Answer 1

I signed the application with my Apple Dev account, (I had renewed it for a different reason after I posted this question) and it appeared in Safari, (and break'd, to let me debug) and worked great!