I see some stirrings on the horizon! Yep, it seems A's flagship was in-system for a few seconds, enough to provide a quick xcode fix... I'll have a proper look tonight & we'll hopefully have a non-buggy mac debug menu in a thrice!
The F-Script dependency has been excised, the real cause of the inspector problem found, and the debug OXP has never worked on 10.3.9 (other than activating remote console support like on Windows and Linux) and isn’t about to start to now.