Using GTK+ on Mac OS X
Using GTK+ on Mac OS X — OS X-specific aspects of using GTK+
Using GTK+ on Mac OS X
The Mac OS X port of GTK+ is an implementation of GDK (and therefore GTK+) on top of the Quarz API.
Currently, the Mac OS X port does not use any additional commandline options or environment variables.
For up-to-date information about the current status of this port, see the project page.
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https://developer.gnome.org/gtk3/3.24/gtk-osx.html