Not long ago, I also had the same problem, I found there are two methods to open CHM on Mac OS and I tried both. One is using a CHM reader Mac, the other one is using a PDFMaster. Each approach has its advantages and you will need to decide which one is most appropriate for your actual situation.
If you just want to open your CHM files rather than doing other operations, using a CHM reader Mac undoubtedly is the easiest and the quickest way. In the opposite situation, you need to take method 1 into account.
So how do you open CHM file on Mac OS? After digging through the internet; I found some of the free MAC CHM reader that will open CHM format files and they are listed here in no particular order. Note that all these programs are completely free ?
iCHM is an completely free and functional CHM reader for MAC that has the ability to search, tab browse files, navigate instantly and export CHM to PDF format without too much of fuss.
CHM files seems to work easily with Chamonix viewer which has features much more similar to that of the default windows CHM reader with options to add pages as favorites, search content and navigate through the index.
CHM Viewer Star is a convenient and efficient CHM file reader. It features a user-friendly interface that gives you fast access to all built-in design tools for viewing CHM files. It allows you to zoom the text so that you can understand it easily. The contents are on the left side column and show all of the functions and methods. You can also add bookmarks and this app also displays history. CHM Viewer Star has a search option that enables you to find different CHM files. It provides you with full-screen mode by using which you can enlarge the window. You might also like to download Sublime Text 4 for Mac
Although a number of help authoring tools have emerged and provided various outstanding services for their users, the CHM file format can yet cater to several demands on the market. For Windows users, you can just double-click the CHM file and open it. But for Mac users, it is better to download a CHM reader for a smooth reading experience.
Or to convert CHM files into PDFs is a good choice, for the PDF format is one of the most widely supported document formats, and you can open it by a PDF reader. There are different PDF readers, and you can choose your favorite one.
Clearview is an easy-to-use tabbed style e-book reader for Mac, equipped with library shelf, supports popular e-book formats as PDF, EPUB (DRM free), CHM, and MOBI. You can make annotations, insert bookmarks, and do searching freely.Clearview reader came with a belief that reading should be enjoyable and can be easy. It was designed to help you read e-books quickly, clearly and efficiently. Everything you want about a desktop e-reader just got much better in Clearview. And much easier.Runs on OS X 10.7.0 and later, optimized for Yosemite. (The last version compatible with OS X 10.6.8 is v1.5.6)
Download kchmviewer for free. kchmviewer is a reader for CHM (Winhelp) and EPUB files using Qt toolkit with optional KDE support. The main point of kchmviewer is compatibility with non-English chm files, including most international charsets.
ADE is ranked among the best EPUB3 readers by EPUBTest.org. The support for EPUB 3 standard allows you a richer reading experience, including: rendering of audio and video content; support for right to left reading; dynamic image resizing without loss in clarity, interactive quizzes, better rendering of math formulas, and huge improvements in support for assistive technologies.
Beside Flash version, all publications created by Flip CHM will also include HTML5 version. The readers will be able to open your flip page publication in any environment (PC, Mac, iPhone, iPad, Android, or Windows Mobile), and you can even publish at your Facebook page. 2b1af7f3a8