The CHM files (Microsoft compiled HTML help files) are often used for eBooks. They are readable on OS-X using excellent open source CHMOX application. If you want to get more useful preview in OuickView than the not very helpfull static icon, get this plugin.

Download here

How to install it: Unzip it, take the proper package for your system (the ZIP file contains several architectures, on modern Intel-based Mac's you want to use x64), put it inside


and enjoy !

Big thanks to the developer Qian Qian - whoever that is.