Installing into your system location requires root access. To do something as root, you need to use the `sudo` command. This will prompt you for your password and then let your command succeed. So if you had typed `gem install compass` now you should type `sudo gem install compass`
On Friday, March 22, 2013 11:38:10 PM UTC-7, aaron.matth...@gmail.com
I get this error
ERROR: While executing gem ... (Gem::FilePermissionError)
You don't have write permissions into the /Library/Ruby/Gems/1.8 directory.