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If you receive the following info, it means your PDF book is DRM protected. For how to check your PDF book is DRM free or not, you can load your PDF book into Calibre and try to open it with Calibre. Why? Because DRM and password limit you to do the conversion job. If you have PDF document with password, then you should remove PDF password first. In order to successfully convert PDF to EPUB Mac, the first and essential step is to make your PDF books DRM free.
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Methods introduced also applies to converting PDF to EPUB Win. So this article will show you how to convert PDF to EPUB Mac. Quite annoying, right? But believe me, you can just free yourself from this trouble by converting PDF to EPUB as EPUB can adjust itself to the size of the screen.
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You have to zoom back and forth all the time. Although you're able to read those PDF books on your iPad or iPhone, it's really painful if you have tried that. The books you bought from kobo, Sony, Google Play may be PDF format.
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