Does restarting a Mac clear the clipboard?

Yes. Restart, shutdown, and logout all clear the system clipboard because it is stored in memory, not on disk.

Does sleeping my Mac clear the clipboard?

No. Sleep keeps your session alive, so your last copied item is still available when you wake the Mac.

Is there a way to keep clipboard items after a restart?

Yes, with a clipboard history app like ClipHistory that records clips to local storage and restores them after reboot.

Does logging out clear the clipboard?

Yes. Logging out ends your session and tears down the pasteboard server, clearing the current clipboard.

Does Restarting Your Mac Clear the Clipboard?

Short answer: yes. Restarting, shutting down, or logging out clears the macOS clipboard. If you copied something and then rebooted, that single item is gone unless you took a step to preserve it. Here is exactly what happens and how to avoid losing copied content again.

What the Clipboard Actually Is

When you press Cmd+C, macOS hands the data to a background process called the pasteboard server (pboard). It holds the current item in memory so any app can paste it. Crucially, this storage is volatile: it exists only while the system session is alive.

A restart terminates and re-launches every system process, including pboard. The new instance starts empty. Nothing is written to disk during this handoff, so there is no clipboard file to restore from.

Does logging out clear it too?

Yes. Logging out ends your user session, which tears down the pasteboard server just like a full restart. Switching to another user account also leaves the original session's clipboard inaccessible.

What about sleep?

Sleep is the exception. Putting your Mac to sleep does not clear the clipboard, because the session stays alive in memory. When you wake the machine, your last copied item is still there.

What Survives a Restart (and What Does Not)

Action	Clipboard preserved?
Sleep / wake	Yes
Closing the lid	Yes
Quitting an app	Yes
Restart	No
Shut down	No
Log out	No

So the system clipboard is more durable than people think during a session, but a reboot always wipes it.

How to Keep Copied Items Across Restarts

The only dependable way to retain clips through a restart is to record them to disk as you copy. That is exactly what a clipboard history app does.

ClipHistory captures every copy automatically and stores it locally on your Mac. After a restart, open your history with Cmd+Shift+V and your past clips are still there. It keeps the 150 most recent unpinned clips plus unlimited pinned clips.

The pinning habit

For anything you truly cannot lose, pin it. Pinned clips are not subject to the 150-item limit and persist across every reboot. Think license keys, a shipping address, a frequently used command, or a draft you are not ready to lose.

Snippets for reusable text

If you paste the same content over and over, save it as a snippet instead of relying on history. Snippets are permanent and organized, so a busy copy session never pushes them out.

Privacy Note

Because ClipHistory stores everything locally, your copied data never touches the cloud and there is no account to create. The app is signed and notarized by Apple, ships as a universal binary for Apple Silicon and Intel, and runs on macOS 12 and later.

Bottom Line

Restarting your Mac clears the clipboard every time. Sleep does not, but you cannot count on sleep when an update or crash forces a reboot. A clipboard manager turns a one-shot system clipboard into a durable, searchable history that outlives any restart.

Keep your clipboard across reboots with ClipHistory for macOS — a one-time $19.99 (12-month license, no auto-renewal). Download ClipHistory.