Enolsoft has announced EPUB Viewer for Mac OS X (10.6 and higher). It’s available for US$29 at www.enolsoft.com . A demo is available for download.
Featuring zoom-in, zoom-out, bookmarks, scrolling, printing and more, EPUB Viewer helps anyone open and read non-DRM protected EPUB eBooks on a Mac, as well as convert EPUB docs to the Adobe PDF format.
You can open and view multiple EPUB files on a Mac in Tab mode. You can play embedded media files, audio and video in EPUB files. EPUB Viewer lets you manage EPUB eBooks on a bookshelf and much more.