➜  test create-react-app react_mock

You are running `create-react-app` 5.0.0, which is behind the latest release (5.0.1).

We no longer support global installation of Create React App.

Please remove any global installs with one of the following commands:
- npm uninstall -g create-react-app
- yarn global remove create-react-app

The latest instructions for creating a new app can be found here:
https://create-react-app.dev/docs/getting-started/

我发现是因为create-react-app没安装
执行如下命令安装后 就好了

➜  test  sudo npm install -g create-react-app
Password:
npm WARN deprecated tar@2.2.2: This version of tar is no longer supported, and will not receive security updates. Please upgrade asap.

changed 67 packages in 2s

可以创建项目了

➜  test create-react-app react_mock

Creating a new React app in /Users/mac/test/react_mock.

Installing packages. This might take a couple of minutes.
Installing react, react-dom, and react-scripts with cra-template...


added 1353 packages in 24s

Initialized a git repository.

Installing template dependencies using npm...
npm WARN deprecated source-map-resolve@0.6.0: See https://github.com/lydell/source-map-resolve#deprecated

added 39 packages in 4s
Removing template package using npm...


removed 1 package in 2s

Created git commit.

Success! Created react_mock at /Users/mac/test/react_mock
Inside that directory, you can run several commands:

  npm start
    Starts the development server.

  npm run build
    Bundles the app into static files for production.

  npm test
    Starts the test runner.

  npm run eject
    Removes this tool and copies build dependencies, configuration files
    and scripts into the app directory. If you do this, you can’t go back!

We suggest that you begin by typing:

  cd react_mock
  npm start

Happy hacking!