Kensington expert mouse Trackball

I have used these things, back when they were called Turbo Mouse, for years. I have one on this Macbook Pro, and one on my old G5.

Several years ago Kensington really dumbed down the driver software for the Trackball. I was told by their suppor that they were going to revamp it so that it worked as before.

I just left their website and saw that the Trackball Works software is no longer available for Macintosh, and in the reviews I saw a comment that said that it no longer worked except for the newest Macs.

So does that mean that Apple has developed something to run this 4 button, highly (in the old days) programmable device?

Thank you

DN