mac git 免密码

$ ssh-add -L

The agent has no identities.

再执行一次 `ssh-add`，根据提示输入密码，成功后会展示你本机的[ssh密钥](https://so.csdn.net/so/search?q=ssh%E5%AF%86%E9%92%A5&spm=1001.2101.3001.7020)地址；