Warning: You are using OS X 10.1

mac执行命令时遇到类似下面的警告和报错：
Warning: You are using OS X 10.11.
We do not provide support for this pre-release version.
You may encounter build failures or other breakage.
Error: Could not create /usr/local/Cellar
Check you have permission to write to /usr/local

解决办法：
执行这句话再重新运行 sudo chown -R $(whoami):admin /usr/local