Display Postscript got dropped after Rhapsody/MacOS X Server 1.x.
None of the 10.0+ releases of macOS used DP, instead it used Quartz2D, eventually added OpenGL to the mix, and now uses a combo of Quartz and Metal.
None of the 10.0+ releases of macOS used DP, instead it used Quartz2D, eventually added OpenGL to the mix, and now uses a combo of Quartz and Metal.
End of the day one can drag windows around smoothly and resize them without flickering and have consistent drag and drop etc and the other does not.
No, it doesn't. But means one cannot claim "it will always have little bits of jank, always have inconsistencies although all it does is draw objects on a screen" just because it is old, since it turns out it actually isn't. X11 does have a lot of cruft, but so does WindowServer.
> End of the day one can drag windows around smoothly and resize them without flickering and have consistent drag and drop etc and the other does not.
That is just a lie. I can easily make Firefox flicker on OS X while resizing and I can easily resize say Gtk+3 windows on X without flickering. And I have almost 3 4k displays...
That said, I do agree that I would generally expect even older Apple codebases to be less crufty than stuff like Xorg. Apple rips out legacy APIs and rewrites things pretty ruthlessly on basically every macOS release.