解决办法：
1、找到jupyter的安装位置

pip3 show jupyter

根据location可以找到jupyter的位置/Users/wangyajing/Library/Python/3.8/bin
2、vim编写

vim ~/.zshrc 

export PATH=/Users/wangyajing/Library/Python/3.8/bin/:$PATH

结束后输入:wq并回车退出编辑
3、载入命令并启动jupyter notebook

source .zshrc
jupyter notebook