laravel5安装

composer global require "laravel/installer=~1.1"

Changed current directory to /Users/apple/.composer
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Nothing to install or update
Generating autoload files

执行后的结果

laravel new blog

laravel: command not found

应该要将laravel加入到PATH
可是我的地址是什么呢?