New GNOME dialog on the right:
Apple's dialog:
They say GNOME isn't a copy of macOS but with time it has been getting really close. I don't think this is a bad thing however they should just admit it and then put some real effort into cloning macOS instead of the crap they're making right now.
Here's the thing: Apple's design you'll find that they carefully included an extra margin between the "Don't Save" and "Cancel" buttons. This avoid accidental clicks on the wrong button so that people don't lose their work when they just want to click "Cancel".
So much for the GNOME, vision and their expert usability team :P
Sometimes when you get UI experts and users and engineers in the same room they iterate to similar outcomes because its the logical conclusion. Apples design in this case isn't ground breaking or even original.
If multiple species of jumping spider can independently evolve the ability to see red from different branches of their family tree, multiple dev teams can come to the same conclusion about what is more comfortable for reaching with consideration for left and right handed people on various types of screens.
The problem is so scoped these days, its fairly logical for UIs to come to the same outcome.