I'm faced with a 600 pages long PDF document. There's some vital information on it but at least half of those pages are not necessary so I would like to exclude them from the PDF prior to printing to save papers and time.
I'm on Mac OS X, one before the latest (I am not sure of naming conventions but I think it's 10.7.5)
How can I do this? Possibly with free software or even what's on the mac?