mac下安装composer

1.命令输入

1.进入bin目录

cd /usr/local/bin

2.curl命令下载

curl -sS https://getcomposer.org/installer | php

如果出现以下报错

All settings correct for using Composer
The installation directory "/usr/local/bin" is not writable
sudo chown -R $(whoami):admin /usr/local/bin 请输入这一条 -- 然后提示计算机输入密码 -

继续执行上一条命令之后

mv composer.phar /usr/local/bin/composer  #全局配置