Since Adobe's epub may be the most popular document format and the layout of an epub document is responsive that means an epub format will automatically adjust for different screen sizes, so today we are going to introduce you 5 best epub reader for Mac. Installing one or some good reader apps on the computer is indispensable for us. Although it's good for us to read ebooks on E-ink reader, maybe sometimes you're writing a paper or using a text as a reference for a project, or maybe you just want to have a glance of the ebooks or read a few chapters of a novel on your computer.