how to get my ipod songs on my mac?

Do you mean is there way to copy files from an iPod to a Mac what aren't already on the Mac?

If that's the question, yes, there's a shareware application called iPodRip that does that very thing. There are probably others but that one has worked well for me.

Take a a look at this site

http://www.ilounge.com/

and do a search, it has so much discussions on this topic.

I have used the freeware/shareware Senuti with success.