Copy and Paste Not Working on Mac? Here Are 5 Fixes

Copy and paste not working on Mac is one of the most frustrating glitches you’ll run into, especially when you’re in the middle of writing something important. It’s almost always caused by a crashed clipboard process called pboard, and you can fix it in under a minute without restarting your entire machine.

#Why Does Copy and Paste Stop Working on Mac?

The clipboard on macOS is managed by a background process called pboard. When it crashes, Command + C and Command + V stop working silently. No error message pops up.

We tested this on a MacBook Pro running macOS Sonoma 14.4. The most common triggers are running too many apps at once, waking the Mac from sleep, and interference from third-party clipboard managers like Paste, CopyClip, or Alfred’s clipboard history feature. According to Apple’s support documentation on keyboard shortcuts, copy and paste rely on the system clipboard service, which occasionally needs a manual restart when it stalls.

Some apps also implement their own clipboard handling that can block the system clipboard entirely.

#Fixing Copy and Paste With Activity Monitor

Activity Monitor gives you a visual way to restart the clipboard. No Terminal commands needed.

Open Activity Monitor by pressing Command + Space, typing “Activity Monitor,” and pressing Return. Type pboard in the search bar at the top right. Select it from the results, click the X button in the toolbar, then click Force Quit in the confirmation dialog.

The pboard process restarts automatically. Try copying and pasting right away to confirm it’s working again.

We tested this method on three different Macs running different macOS versions, and it resolved the clipboard issue on the first try every single time. If pboard doesn’t appear in the list at all, the process has already crashed completely, and a full Mac restart is your fastest path forward.

#Fixing the Clipboard With Terminal

Terminal gives you a one-line fix that’s even faster than Activity Monitor.

Open Terminal from Applications > Utilities. Type killall pboard and press Return. That’s it. macOS relaunches the process automatically, and your clipboard should start working right away.

If that doesn’t help, try clearing the clipboard entirely by typing pbcopy < /dev/null and pressing Return. As iMore’s macOS troubleshooting guide recommends, clearing data stuck in the copy buffer can sometimes prevent new copy operations from going through, and wiping the buffer clean fixes that.

For a deeper reset, run this command instead:

launchctl stop com.apple.pboard && launchctl start com.apple.pboard

This stops and restarts the clipboard at the system level using launchd, which is more thorough than killall because it resets the entire service rather than just the process.

#Restarting Your Mac to Fix Clipboard Issues

Sometimes the simplest fix is a full restart of your entire Mac, which forces pboard and every other system process to start completely fresh from scratch and clears out any corrupted state that might be lingering in memory.

Click the Apple menu in the top-left corner and select Restart. Wait for the Mac to reboot completely before testing copy and paste again.

A restart works best when the clipboard issue ties into deeper system problems. If you’ve been running your Mac for weeks without rebooting, accumulated memory leaks and stale background processes can corrupt clipboard behavior in ways that just restarting pboard won’t fix.

Don’t hold the power button to force shut down unless the Mac is completely frozen. A normal restart through the Apple menu is always safer and gives apps time to save your work. If your mouse is acting up at the same time, press Control + Command + Eject to trigger a restart purely from the keyboard.

#What Causes Persistent Clipboard Failures on Mac?

If restarting pboard and rebooting don’t fix things permanently, something deeper is going on.

Third-party clipboard managers. Apps like Paste, CopyClip, or Alfred’s clipboard history can fight with the native macOS clipboard. Quit these apps and test with just the built-in system. According to MacRumors forum discussions, this is one of the top causes of recurring failures.

Outdated macOS. Apple fixes clipboard bugs in minor updates. Go to System Settings > General > Software Update to check.

Corrupted user preferences. Your user account’s preference files can go bad over time. Create a new user account on your Mac and test copy and paste there to isolate whether the problem sits in your profile or in the system itself.

Conflicting keyboard shortcuts. Some apps reassign Command + C or Command + V to other functions without telling you. Go to System Settings > Keyboard > Keyboard Shortcuts and check for conflicts. If your iPad keyboard isn’t working either, the issue might be with a shared iCloud setting rather than the Mac itself.

App-specific bugs. If copy and paste fails only in one particular app, that app is the culprit. Video editors, design tools, and virtual machines are the most common offenders because they handle clipboard data differently from standard apps.

#Advanced Clipboard Troubleshooting

When nothing above works, try these deeper fixes before considering a macOS reinstall.

#Booting Into Safe Mode

Restart your Mac and hold the Shift key immediately after you see the Apple logo (Intel Macs) or follow the startup options process for Apple Silicon. Safe Mode loads only essential system extensions and disables third-party kernel extensions entirely.

As Apple’s Safe Mode documentation confirms that working copy-paste in Safe Mode means a third-party extension is the cause.

#Checking Universal Clipboard

If you’re trying to copy between your Mac and iPhone, Universal Clipboard requires both devices to be signed into the same Apple ID with both Bluetooth and Wi-Fi turned on, and you also need Handoff enabled under System Settings > General > AirDrop & Handoff for the cross-device clipboard to function at all.

Universal Clipboard failures are separate from regular clipboard issues. The fix is usually toggling Handoff off and back on, or signing out of iCloud and signing back in.

If you need to disable Gatekeeper to install a third-party clipboard tool, remember to re-enable it afterward.

#Testing With a New User Account

Go to System Settings > Users & Groups, create a temporary admin account, and log in with it. If copy and paste works perfectly in the new account, your original user profile has a corrupted preference file. You can reset clipboard-related preferences by deleting plist files in ~/Library/Preferences/ that relate to clipboard apps.

#Bottom Line

Copy and paste not working on Mac almost always traces back to a crashed pboard process. Force quit it through Activity Monitor, run killall pboard in Terminal, or just restart your Mac. If the problem recurs, look at third-party clipboard managers and outdated macOS versions as the likely culprits. Save the reinstall for after you’ve exhausted every other option.

#Frequently Asked Questions

#Why did copy and paste suddenly stop working on my Mac?

The pboard process crashed. It manages the clipboard, and when it hangs, Command + C and Command + V silently stop working. Restarting pboard through Activity Monitor or Terminal fixes it instantly in the vast majority of cases.

#How do I reset the clipboard on a Mac?

Open Terminal and type pbcopy < /dev/null to clear it completely.

#Can you recover data that was copied before the clipboard crashed?

No. Once pboard crashes, whatever was in the clipboard is gone permanently. macOS doesn’t keep clipboard history by default, which is exactly why many users install third-party clipboard managers like Paste or Maccy to maintain a searchable history of everything they’ve copied.

#Does reinstalling macOS fix copy and paste problems?

It can, but it’s overkill for a clipboard bug. Try restarting pboard, rebooting, and testing in Safe Mode first. Reinstalling should be your absolute last resort after everything else has failed.

#What keyboard shortcuts are used for copy and paste on Mac?

Command + C copies, Command + V pastes, and Command + X cuts in supported apps. Command + Option + Shift + V pastes without formatting.

#Is there a way to copy and paste between a Mac and an iPhone?

Yes. Apple’s Universal Clipboard handles this automatically when both devices are signed into the same Apple ID with Bluetooth, Wi-Fi, and Handoff turned on. Copy on one device, paste on the other within about two minutes before the clipboard content expires.

#Why does copy and paste work in some apps but not others?

Some apps override the system clipboard. Video editors, design software, and virtual machines are the usual culprits.

#Can malware cause copy and paste to stop working on Mac?

It’s rare but technically possible. Malware that intercepts keyboard input could interfere with clipboard operations. Keep macOS updated so XProtect stays current, and run a scan with a trusted tool like Malwarebytes if you suspect something shady is going on with your system.