mac环境 laravel: command not found问题解决方案

<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">今天开始学习laravel,laravel用composer 安装，在终端输入laravel new blog(project name)得时候，出现了以下问题laravel: command not found</span><span style="font-family: Arial, Helvetic