Our website provided a free download of InertialScroll 0.1 for Mac. InertialScroll for Mac lies within Audio & Video Tools, more precisely Editors & Converters. The actual developer of this software for Mac is keeener at gmail dot com.
From the developer:
Used scrolling on your iPhone/iPod/iPad?
Jealous of the early-2010 MacBooks and its fancy inertial scrolling capability?
Get this utility to add the same to your MacBook, you'll wonder how you scrolled before...
This should support any MacBook with a multitouch capable trackpad. I don't have all the different MacBooks to test with so give it a try. Let me know your results. Works on my mid-2009 Unibody MacBook Pro.
You may want to check out more software for Mac, such as Aiseesoft WMV Converter for Mac, which might be related to InertialScroll.