Mousepose for Mac

From Boinx Software Ltd.:

Mousepos 3 is an essential tool for everyone doing presentations or demos. If turned on, it dims the screen and puts a spotlight on the area around the mouse pointer, easily guiding the audiences attention to an area of interest.

Of course, there are other uses as well. If you have a large screen, it helps you quickly locate the mouse pointer when you return to your work after an interruption. Visually impaired people tell us that it helps them as well.

Hitting a user definable hot key turns on the Mousepos effect, dimming the screen and putting the mouse pointer into a spotlight that makes it easy to locate. The desktop behind it remains functional, so that apps can be used while Mousepos 3 is turned on. With Keynote 3, Apple even added a setting that allows you to use Mousepos 3 with the popular presentation software.