[Q] My blender GUI icons are not transparent no more

I switched to a different mac and i noticed Blender on this mac doesnt show proper transparent icons for GUI items.
The grease pencil icon as well as text tool and some others show a certain color.Does anyone know what i need to change where to get this transparent again

In this screengrab you can hardly see it. but there is a square the size of the icon. Here it looks like some bad transparency is going on though. Also it looks white here while its blue.