CHM Reader does exactly what its name implies: it allows you to open and go through the contents of your CHM documents. The app is very simple to handle, so you don't need to have much computer experience in order to work with this Mac program.
Once you import your CHM file, the application gives you access to various options that can help you with your reading experience. For instance, it features zoom in and zoom out options, offers you multi-tab support, and much more.
What's more, the utility enables you to print the imported CHM documents directly from its main window. Just click the Print button from the main toolbar of the application and configure the printing settings according to your needs.
My only issue with this program is the fact that it occasionally runs slow, especially when importing CHM documents. It might take a while to load the selected files, but afterwards it works great.
To conclude, I think it's worth installing this application on your Mac. It lets you read your CHM documents, uses minimum CPU resources, and has a very intuitive interface. Plus, it comes without a price.