Is it possible to use Qt-based applications on OS X that run with elevated
privileges (= as root), in general and if they need to connect to the user's
Typically you need to look at QApplication documentation. There is
something you have to set in that class BEFORE you instantiate it. If
that is not set Qt will block priv elevations. On Linux which, OS x is
just the cheaper less capable BSD, you can then use "capabilities"
(forget the correct name) library which allows a user app to temporarily
elevate its privs for certain things.
Of course, you might wish to check the myriad of "groups" a user account
can belong to. Many times you can simplify things by requiring the
install to have the user be added to a group. This is typical with
things which access the serial port. User needs to be in dialout or
modem or whatever group. This approach is actually safer than temporary
boost of privs because, in theory, the app could crash while boosted
leaving the user running as root.
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