You’re thinking of the framework ProKit, which was used by a bunch of apple’s pro apps. It didn’t dim and desaturate standard elements though - it was a framew

You’re thinking of the framework ProKit, which was used by a bunch of apple’s pro apps. It didn’t dim and desaturate standard elements though - it was a framework offering a set of custom controls that had their own art. That art was drawn to look similar to desaturated versions of standard controls.