Convert PDF presentations to Keynote

PDF to Keynote is a free tool for converting PDF-based presentations (e.g., made using LaTeX with Beamer) into Apple's Keynote format. Once translated into Keynote format, every page of the original PDF becomes an image on its own slide, so no further edition is possible.
The advantages of presenting PDFs using Keynote include: the presenter display, rehearsal support, and notes visible only to the presenter.

Source: http://www.cs.hmc.edu/~oneill/freesoftware/pdftokeynote.html