Kelvin Sherlock, the IIGS programmer responsible for GShisen and many other popular applications, has released Shrink-Fit X for Mac OS X.  According to the App Store description:  “Shrink-Fit X is a utility for opening and extracting NuFX (ShrinkIt) files on OS X.”

 

Shrink-Fit X for Mac OS X

 

Shrink-Fit X, which requires Mac OS X 10.6 or later, is available now as a free download from the Mac App Store.  Check it out here.