Screenshot Not Working on Mac? How to Fix It

You press the shortcut and nothing happens

You hit Cmd+Shift+3 and your Mac just sits there. No shutter sound. No file on the Desktop. No floating thumbnail. It worked yesterday, and now it doesn't. This is one of the most common macOS issues, and the fix is usually one of seven things.

Work through these fixes in order. Most people solve it in the first three steps.

1. Check that keyboard shortcuts are enabled

macOS lets you disable screenshot shortcuts entirely. If another app or a system update toggled this setting, your shortcuts will silently stop working.

Open System Settings > Keyboard > Keyboard Shortcuts > Screenshots. Verify that all five screenshot options are checked:

• Save picture of screen as a file
• Copy picture of screen to the clipboard
• Save picture of selected area as a file
• Copy picture of selected area to the clipboard
• Screenshot and recording options

If any are unchecked, check them and try your shortcut again. If the shortcuts show a different key combination than the default, another app may have reassigned them.

2. Restart the screenshot process

The macOS screenshot system runs as a background process. Sometimes it hangs. Restarting it often fixes the issue immediately.

Open Terminal and run:

killall SystemUIServer

This restarts the process that handles screenshot capture. Try your shortcut again after running this command. If that doesn't work, also try:

killall ScreenShotAgent

3. Check for conflicting apps

Third-party apps commonly hijack Cmd+Shift+3, 4, and 5. The usual suspects:

Quit any screenshot or window management apps and try again. If the shortcut works after quitting a specific app, check that app's preferences and change its hotkeys to avoid the conflict.

4. Check your save location

If you previously changed where screenshots are saved and that folder no longer exists — maybe it was on an external drive, a deleted folder, or a cloud-synced directory that went offline — macOS will silently fail to save your screenshot.

Check your current save location:

defaults read com.apple.screencapture location

If this returns a path that doesn't exist, either create the folder or reset to the Desktop:

defaults delete com.apple.screencapture location
killall SystemUIServer

5. Check disk space

If your startup disk is full, macOS can't write the screenshot file. Open System Settings > General > Storage and check your available space. A Retina screenshot can be 3–8 MB, so you need at least some breathing room.

Quick check from Terminal:

df -h /

If your disk is nearly full, clear space and try again. Move large files, empty the Trash, or delete old screenshots you no longer need.

6. Check screen recording permissions

Starting with macOS Catalina, some screenshot operations — especially capturing specific windows or screen regions in certain apps — require screen recording permission. This primarily affects third-party screenshot apps, but in rare cases the system tool can be affected too.

Go to System Settings > Privacy & Security > Screen Recording. If you see any screenshot tools listed, make sure they're toggled on. If the built-in screenshot tool isn't working in specific apps (like streaming or DRM-protected content), those apps may be blocking screen capture intentionally.

7. Reset the NVRAM

If nothing else has worked, resetting NVRAM can clear corrupted settings that affect keyboard shortcuts and system processes. This is safe and doesn't delete your data.

For Intel Macs: shut down, then press the power button and immediately hold Option+Cmd+P+R for about 20 seconds.

For Apple Silicon Macs (M1/M2/M3/M4): NVRAM resets automatically on restart. Simply shut down and start up again.

Quick troubleshooting reference

If none of this works

Create a new user account on your Mac and test screenshots there. If screenshots work in the new account, the issue is in your user profile — a corrupted preference file or a launch agent interfering. If screenshots also fail in the new account, you may need to reinstall macOS.

Before going that far, try booting into Safe Mode (hold Shift during startup on Intel Macs, or hold the power button on Apple Silicon and select "Safe Mode"). Safe Mode disables third-party extensions and clears caches. If screenshots work in Safe Mode, a login item or kernel extension is the culprit.

Skip the troubleshooting entirely

The built-in screenshot tool breaks, conflicts with other apps, and requires Terminal commands to fix. If you're spending time fixing your screenshot workflow instead of using it, that's a sign the workflow itself is the problem.

LazyScreenshots uses its own capture engine that doesn't depend on macOS SystemUIServer. It captures, annotates, and auto-pastes screenshots directly into your AI assistant or any app — no file management, no conflicts, no troubleshooting.