Maccy Duplicate Items: Why They Appear and How to Stop Them

This guide covers how Maccy App decides two items are “the same,” the five most common reasons it decides they are not, and how to fix each. The settings paths below match recent Maccy Mac versions. Menu labels shift slightly between releases, so check yours.

How does Maccy handle duplicates by default?

Maccy Clipboard checks each new clipboard entry against existing history. If it finds an identical item, it does not add a second row. It moves the existing entry to the top and increments that item’s copy count. A real duplicate should therefore never appear as two separate rows.

The key word is identical. A clipboard entry is not just a string. macOS lets an app place several representations of the same copy on the pasteboard at once: plain text, RTF, HTML, and sometimes private metadata types. Maccy compares what was stored, not only what you see. Two copies that look the same on screen can differ underneath.

Why am I seeing the same text twice?

1. Rich text and plain text are different items

This is the most frequent cause. Copy a sentence from a web page and the pasteboard carries styled text. Copy the same sentence from a plain-text editor and it carries only plain text. To you it is one sentence. To Maccy it is two distinct clipboard payloads, so you get two rows.

You will notice it most when you work across browsers, Notes, Pages, and code editors, where the same snippet passes through apps with different formatting behavior.

What to do:

• Open Maccy’s settings and look at the Storage section. If you do not need formatted content in history, restrict what Maccy saves so styling does not create variants.
• Paste with plain-text intent when you can (⌥⇧⌘V in apps that support Paste and Match Style), though that affects pasting, not how Maccy stores a copy.

2. Another app rewrites the clipboard after you copy

Utilities that strip formatting, expand snippets, or clean URLs work by changing the clipboard right after a copy. If Maccy reads the clipboard before the utility finishes, it stores the original. A moment later it sees the modified version and stores that too. The result is a pair that differs only by formatting.

This has been discussed in the Maccy issue tracker in connection with a plain-text-conversion app. The app’s developer reportedly made it clipboard-manager friendly, but a small chance of rich and plain duplicates remained. A proposed fix was for Maccy to detect such a rewrite and replace the original entry.

How to diagnose it: quit the other clipboard utility, copy the same text twice, and see whether the duplicates stop. If they do, you have found the conflict. Then look for a compatibility option in that utility, or add the app to Maccy’s ignore list if it makes sense. You can use a pasteboard inspector such as Pasteboard Viewer to see exactly which types each copy carries.

3. Universal Clipboard is feeding Maccy from another device

With Handoff on, anything you copy on an iPhone, iPad, or another Mac signed into the same Apple ID can land on this Mac’s clipboard. Maccy sees it as a normal copy. If you copied the same text on both devices, you may see both versions.

This is Apple’s Universal Clipboard behavior, not a Maccy defect. Maccy’s maintainer has pointed to a specific fix: add com.apple.is-remote-clipboard to the pasteboard types Maccy ignores.

Steps:

1. Open Maccy → Settings → Ignore.
2. Go to the pasteboard types list.
3. Add com.apple.is-remote-clipboard.

Alternatively, turn off Handoff in System Settings if you do not use Universal Clipboard at all.

4. The sort order makes repeats look wrong

Maccy offers several sort modes, including last copy time, first copy time, and number of copies. If you sort by first copy time, an item you just re-copied stays at its original position instead of jumping to the top. It looks as if the copy did nothing, or as if an old entry is lingering.

If you expect “copy it again and it moves to the top,” use last copy time.

5. The items really are different

A trailing space, an extra newline, or different line endings (Windows \r\n versus Unix \n) are enough to make two strings distinct. You often pick these up when copying from terminals, PDFs, and chat apps, which add or trim whitespace on their own. Maccy is doing the right thing here. The fix is on the source side, or you can accept the extra row.

How do I remove duplicates that already exist?

Maccy does not, as far as I know, have a one-click “remove duplicates” command. Your options:

• Delete single items: highlight the entry in the Maccy window and use the delete shortcut (⌥⌫).
• Clear history: use the Clear option in the menu if you want a clean slate. Pinned items are intended to survive this, but test it on a throwaway pin first.
• Pin what matters first: pin the items you keep, then clear the rest.

A bulk “paste or delete multiple items” feature has been requested in the project’s issue tracker for years, so selective bulk cleanup remains limited.

Could it be something else entirely?

Before you change settings, rule out these look-alikes.

• Two Maccy instances or two Macs sharing a history folder. Some users have found a shared history because the Maccy data directory was synchronized between machines. In older versions the data lived under ~/Library/Containers/org.p0deje.Maccy/Data/Library/Application Support/Maccy. If a cloud service syncs that folder, you can get odd merged or doubled history.
• Missing items, not extra ones. If you copy very fast, such as hundreds of items in quick succession, entries can fail to appear. That is a different issue from duplicates.
• Password managers. They usually clear the clipboard after a short time. Maccy tries to respect this for the most recent item, but it cannot always tell a password from normal text, so entries can linger.

A short troubleshooting checklist

1. Copy a plain word (no formatting) twice. If Maccy shows one row, the base behavior is fine.
2. Copy from the exact source that produces duplicates. If the duplicates return, inspect the pasteboard types.
3. Quit other clipboard or text-cleaning utilities and retest.
4. Turn off Handoff or ignore com.apple.is-remote-clipboard.
5. Check the sort setting.
6. Update to the latest Maccy release and retest.

The honest trade-off

Strict deduplication would be easy if Maccy only compared visible text. It would also throw away real information: the formatted and plain versions of a copy are legitimately different when you paste into a rich editor. Keeping them separate preserves what you copied, at the cost of the occasional visual repeat. For a local-first tool that does not guess what you meant, that is a defensible default. If it bothers you, narrow what Maccy stores and ignore the sources that create noise.

Which of the five causes did you find in your setup? If it was something not listed here, it is worth reporting in the project’s issue tracker with the pasteboard types attached.