Instant, reversible, works on macOS Ventura through Sequoia. Cons: Hides again when you press the same shortcut again; not permanent.
: This method also works within native macOS Open and Save dialogs, allowing you to access hidden files when uploading or saving documents in applications. show hidden finder link
: Some users prefer the YES/NO syntax instead of -bool true/false . Both work identically: Instant, reversible, works on macOS Ventura through Sequoia
If your default shortcuts (like Applications, Desktop, or Documents) are missing from the left panel, go to Finder > Settings (or Preferences) > Sidebar and check the boxes next to the locations you want to reveal. Important Safety Warning show hidden finder link
Example: