Ultimate Converter 

Ultimate Converter from Epubor is a program designed to help you easily change the format of your eBook files. This application supports a wide variety of input formats, allows you to convert multiple files at the same time, and carefully preserves the original layout of the input documents.

The app might prove to be of good use if you wish to read your favorite eBook on a device that doesn't offer any support for formats such as AZW, AZW4, PRC, TPZ, etc. You can edit the metadata of the input files and choose between three output profiles (PDF, MOBI, and EPUB).

What's more, the utility brings you an integrated search tool on the right side of the main window. With its help you can easily find eBooks on your computer by entering a word from its title, the name of the author or even a part from the file's introduction.

The only thing I don't like about the app is the fact that it doesn't let you select individual output profiles when batch converting eBooks.

In my opinion, it's worth acquiring this application only if you're dealing with a large collection of eBooks and need to convert them to other formats. This program offers you quality results within moments, is very simple to handle, and helps you easily find eBooks on your Mac.