MacBook-Air:~ mikkunn$ /usr/bin/ruby -e "$(/usr/bin/curl -fsSL https://raw.github.com/mxcl/homebrew/master/Library/Contributions/install_homebrew.rb)"

==> This script will install:

/usr/local/bin/brew

/usr/local/Library/Formula/...

/usr/local/Library/Homebrew/...

Press enter to continue

==> /usr/bin/sudo /bin/mkdir /usr/local

WARNING: Improper use of the sudo command could lead to data loss

or the deletion of important system files. Please double-check your

typing when using sudo. Type "man sudo" for more information.

To proceed, enter your password, or type Ctrl-C to abort.

Password:アカウントのpasswordを入力

==> /usr/bin/sudo /bin/chmod g+rwx /usr/local

==> /usr/bin/sudo /usr/bin/chgrp admin /usr/local

==> Downloading and Installing Homebrew...

==> Installation successful!

Now type: brew help