clipx

LAN clipboard sync for macOS. Copy on one Mac, paste on another. Instantly.

No cloud. No account. No Apple ID. No flaky Universal Clipboard.

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Why clipx?

Apple's Universal Clipboard is unreliable. It needs the same Apple ID, Bluetooth, Wi-Fi, and Handoff all working together — and it regularly just doesn't.

clipx replaces all of that with a single UDP connection between your Macs. Pair them once, install, done.

How it works

Each Mac runs clipx as a background daemon. When you copy something, clipx sends the clipboard content directly to all paired peers via UDP unicast on port 9877. When it receives content from a peer, it writes it to your local clipboard.

  • UDP unicast — no multicast, no firewall headaches
  • Explicit pairing — clipx pair <ip>, no auto-discovery
  • SHA-256 dedup — prevents clipboard ping-pong loops
  • Chunked transfer — large content split into UDP-safe packets, up to 10 MB

Install

brew install gomantics/tap/clipx

Or with Go:

go install github.com/gomantics/clipx/cmd/clipx@latest

Pre-built binaries for macOS (Intel & Apple Silicon) are on the releases page.