Mouseposé needs Quartz Extreme (or does it?)

Whenever I upgrade my OS, I get a dialog box from Mouseposé that says

QUartz Extreme is not supported on your computer. Without Quartz Extreme, Mouseposé would be too slow to enjoy.

Here’s an explanation from the Apple web site…

Mouseposè should quit now, but you can test whether it works good enough. No guarantee given

I am able to use Mouseposè just fine without Quartz Extreme (which isn’t supposed on 90% of Apple’s hardware anyway). Is this still an issue? Or is this just a remnant of a warning from long ago?

I still use Mouseposé and I like the software, but that warning makes me nervous.

Dialog box