I'm new to OS X and I'm new to RoR.
Here's what I see when going through my first tutorial on RoR.
"WARNING: Installing to ~/.gem since /Library/Ruby/Gems/1.8 and
/usr/bin aren't both writable.
WARNING: You don't have /Users/sammat/.gem/ruby/1.8/bin in your PATH,
gem executables will not run."
Could someone give a complete newbie instructions on how to fix this?