Keyboard shortcut to show hidden files on macOS Big Sur

Solution 1:

⌘ Command⇧ Shift. still works. Check Keyboard Shortcuts to see if you have a shortcut overriding the toggle hidden files action

To permanently show hidden files, open terminal and type:

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

Solution 2:

on macOS Big Sur 11.1 I had to use YES and NO instead of true or false as parameters to:

$ defaults write com.apple.finder AppleShowAllFiles

Ex:

$ defaults write com.apple.finder AppleShowAllFiles YES; killall Finder

Solution 3:

I can confirm it works on Big Sur 11.1 (20C69). However I can also explain why it doesn't work sometimes.

Apple decided to create shortcuts to go backward and forward in the history, which is great! However they use the following key combinations:

• backward: ⌘ Command⇧ Shift,
• forward: ⌘ Command⇧ Shift.

The forward shortcut takes precedence over the one used to toggle hidden files. So, if you want to show hidden files, make sure to be at the end of your history so you cannot go forward, that way you will be able to toggle hidden files.