I just discovered an Mac app called File Juicer that is designed to extract image files from PDFs. One other thing is can do is extract other files types from exe packages, such as the Windows installers for HPC software. This provides a possible method for Mac users to get hold of those precious .cab files and install HPC programs directly on their HPCs. It doesn't work with every .exe installer but my success rate so far is about 50%
File Juicer by Echo One http://echoone.com/filejuicer/
Nic