macOS hides many files and folders by default — including the Library folder, dot-files (starting with .), system directories, and files flagged with the hidden attribute. Revealing them takes seconds using built-in shortcuts.
Part 1. Show Hidden Files in Finder (Instant Toggle)
Press Cmd + Shift + . (period/dot key) while Finder is active.
This toggles all hidden files and folders visible — hidden items appear slightly greyed out. Press the same shortcut again to hide them.
💡 Tip: This shortcut works in any Finder window including file save/open dialogs in other apps. If you need to navigate to a hidden folder while saving a document, press Cmd+Shift+. in the save dialog to reveal hidden paths.
Part 2. Access the Hidden Library Folder
The ~/Library folder (your user Library) is hidden by default but critical for accessing app data, preferences, and caches:
Method 1 — Go menu: Finder → Go → hold the Option key → Library appears in the dropdown
Method 2 — Go to Folder: Finder → Go → Go to Folder → type ~/Library → Enter
Method 3 — Terminal:
open ~/Library
Part 3. Show All Hidden Files Permanently (Terminal)
To permanently show all hidden files without needing the keyboard shortcut:
defaults write com.apple.finder AppleShowAllFiles YES
killall Finder
To hide them again:
defaults write com.apple.finder AppleShowAllFiles NO
killall Finder
⚠️ Important: Permanently showing all hidden files reveals system directories that should not be modified. Accidentally deleting or moving system files can destabilize macOS. Use the Cmd+Shift+. toggle when you just need occasional access rather than permanently enabling.
Part 4. Show Files Hidden by Attribute (unhide specific files)
If a specific file or folder is hidden by the hidden flag (not the dot-file convention):
chflags nohidden /path/to/file
Or to unhide everything in a folder:
chflags -R nohidden ~/Documents/
Part 5. Important Hidden Folders and What They Contain
| Hidden Location | Contents | How to Access |
|---|---|---|
~/Library/ | App preferences, caches, support data | Option + Go menu |
~/.Trash/ | Trash contents | Cmd+Shift+. in home folder |
/System/ | Core macOS files | Cmd+Shift+. |
~/Library/Application Support/ | App data files | Go to Folder |
/private/var/ | System runtime data | Terminal |
🗣️ r/mac user: "Never knew about Cmd+Shift+. until I needed to find an AutoRecover file. That shortcut should be in every Mac user's muscle memory — it's saved me multiple times."
🗣️ r/MacOS tip: "For recovery purposes, the most important hidden folder is ~/Library/Application Support/ — that's where most apps store their data files. After a crash or data loss, check there before assuming files are gone."
FAQ
How do I show hidden files on Mac? Press Cmd + Shift + . (dot key) in any Finder window. This instantly toggles all hidden files visible. Press again to hide them.
Why does Mac hide files? macOS hides system files and Library folders to prevent accidental deletion or modification. Dot-files (Unix hidden files) are hidden by convention. Neither type is deleted — they're just not shown by default.
How do I access the Library folder on Mac? Hold Option while clicking the Go menu in Finder — Library appears as an option. Or use Go → Go to Folder → type ~/Library.
Can showing hidden files cause problems on Mac? Viewing is completely safe. Modifying or deleting hidden system files can cause issues. Use Cmd+Shift+. to view, and be careful not to move or delete anything in system directories.