SETTING PATH ( RUBY)

The Ruby 1.8 installer for Mac OS X often leaves Ruby 1.6 the default. A lot of Mac users who are looking to play with Rails get bitten by this.
If typing ruby -v in Terminal.app tells you ‘ruby 1.6.8’ then you are having this problem. (Assuming you’ve installed Ruby 1.8—see GettingStartedWithRails)

Assuming you use the bash shell, the easiest method to correct this is as follows:
Open a brand, spanking new Terminal.app window

echo $SHELL must read ”/bin/bash”

echo "" >> ~/.bash_profile

echo "export PATH=/usr/local/bin:\$PATH" >> ~/.bash_profile

chmod +x ~/.bash_profile

Close Terminal window and open a new one

Type ‘ruby -v’ to ensure you now have 1.8.2 working

For csh or tcsh:

Open a brand, spanking new Terminal.app window

echo $SHELL must read ”/bin/csh” or ”/bin/tcsh”

echo "" >> ~/.login

echo "setenv PATH /usr/local/bin:\$PATH" >> ~/.login

chmod +x ~/.login

Close Terminal window and open a new one

Type ‘ruby -v’ to ensure you now have 1.8.2 working

If you get into trouble, stop by the #rubyonrails irc channel.