Calibre is free tools to manage ebooks, convert ebook to different format, our converter can work with Calibre, that get better conversion result, user install Calibre first, then converter will find it and work with it,
1 Download Calibre and install
download at https://calibre-ebook.com, drag calibre app to applications folder,
2 Run Calibre and Setup
run Calibre, there is setup when first run, default setting is good, just click Next button to finish it.
3 Run Converter, Convert format with Calibre
there is checkbox for Calibre at bottom setting, it will be marked when calibre installed.
Convert .mobi .azw3 to pdf epub in Calibre?
1 Add .mobi .azw3 into Calibre
you can drag file into Calibre.