There are many ways to display hidden files in MAC,

1. Terminal

The simplest is to enter commands on the MAC terminal.
Show hidden files (note space and case):

defaults write com.apple.finder AppleShowAllFiles -bool true 

or

defaults write com.apple.finder AppleShowAllFiles YES

Do not show hidden files:

defaults write com.apple.finder AppleShowAllFiles -bool false 

or

defaults write com.apple.finder AppleShowAllFiles NO

After input, click enter, then exit the terminal directly and restart finder.
Restart the finder: first force to exit the finder, and then restart the finder.

2. Shortcut key

Press Shift + cmmand +. On the keyboard to hide the directory where the file is located, and then you can see that all the hidden files in the hidden folder with a small dot in front or the files with light blue are hidden files. In this way, you can view the hidden directory. To restore the hidden file, press Shift + cmmand +. Again to restore the hidden state of the file, as shown in Figure 2. The hidden file is no longer visible.