Bug #14259 was closed when launchd support got committed (yay thank you!!!). However, the underlying methodology it uses was never added to the formal dbus spec. So I'm raising Comment #87 from there here as a specific request: please document it.
In particular, there's a glib feature-request waiting for it, whose
>We need to get it into the spec in the "Well-known
>Message Bus Instances" chapter, this one
>E.g. the same way there's an "X Windowing System" chapter explaining what atoms
>to look at (the stuff involving _DBUS_SESSION_BUS_SELECTION_), there needs to
>be a "Max OS X" chapter explaining exactly how to get the address.
The D-Bus maintainers are unlikely to document a Mac-specific transport, because none of us are Mac users.
If you understand this transport, please document it.
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