The beta department asked me to replace my current "ApplePopoverTopBar.clr" file with one they made for me. One problem... since it's part of macOS it will not allow me to replace, delete or supersede the current one. In fact using their location link and trying to pull it in to the `System/Library/Frameworks/AppKit.framework/Resources` folder the file give me the "grey circle with the "line" acrossed it (like no smoking red circle with a line through it).
So how do I replace this as there appears to be no way to "change the tire while the car is in motion". <grin>
Joseph