1. Show hidden file: open terminal, execute code

defaults write com.apple.finder AppleShowAllFiles -boolean true;killall Finder

Shortcut key: [shift] + [command] + [.]

2. Delete the [. Git] folder, that is, delete the [. Git] folder contained in the folder

3. Cancel the display of hidden files: open the terminal and execute the code

defaults write com.apple.finder AppleShowAllFiles -boolean false;killall Finder

Shortcut key：[Shift] + [Command] + [.]