How can i disable menu blinking after selecting a menu item in macOS I want to disable the slow menu blinking which occurs after I've selected a menu entry from any menu in macOS. It always takes about half a second or more and is just a waste of time since I know what I am doing.

See https://en.wikipedia.org/wiki/Menu_blinking for more information.
It seems this is just a core MacOS feature built in - if you go into system preferences and General, you can change the color to graphite if you prefer, make it less irritating. Apple made this choice because "It is a visual clue to help the user understand they have selected this option", and after this it is executed.