# 1. Failed to connect to github.com port 443: Operation timed out
解决方法：
- 查找github.com (opens new window)
- 查找github.global.ssl.fastly.net (opens new window)
- 查找assets-cdn.github (opens new window)
- 添加到本地host文件中
140.82.113.4 github.com
199.232.69.194 github.global.ssl.fastly.net
185.199.108.153 assets-cdn.github.com 185.199.109.153 assets-cdn.github.com
185.199.110.153 assets-cdn.github.com
185.199.111.153 assets-cdn.github.com
- 清除DNS缓存
sudo killall -HUP mDNSResponder;say DNS cache has been flushed