SwarmMarshal
Apple's Universal Clipboard is great — until one of your machines runs Windows. Then the copy stops at the OS line and you're back to emailing yourself a link. SwarmSpan is a free, tray-only app for both platforms that gives you one shared clipboard and direct file handoff between your Mac and your PC. Local-only, no account, no cloud in the middle.
Copy a path, a stack trace, or a screenshot on either machine and paste it on the other with one hotkey. Plus direct, resumable file transfer at any size — all over your own network, with nothing uploaded to anyone.
Seamless copy-and-paste between a Mac, iPhone, and iPad signed into the same iCloud account. Wonderful when every device is Apple — but it has no concept of a Windows PC, and it keeps only the most recent copy.
If all your devices are Apple, Universal Clipboard is hard to beat and SwarmSpan isn't trying to replace it. It's worth being honest about what it does well.
Copy on iPhone, paste on Mac with zero setup
Built into macOS and iOS — nothing to install
Handoff, AirDrop, and Sidecar in the same family
The moment a Windows machine enters your workflow — a work PC, a gaming rig, a build box — Universal Clipboard simply doesn't apply. This is the exact gap SwarmSpan was built to close.
Nothing crosses to a Windows PC — ever
Requires the same iCloud account, Bluetooth, and Wi-Fi on
No history — it's the last copy only, gone once you copy again
No real file handoff between Mac and PC
| Category | SwarmSpan | Universal Clipboard |
|---|---|---|
| Mac ↔ Windows PC | Yes — that's the whole point | No — Apple devices only |
| Setup | Pair once with a 6-digit code | Automatic inside one iCloud account |
| Clipboard history | Thousands of items, survives reboot | None — last copy only |
| Formats | Text, rich HTML, images, file lists | Text and images |
| File transfer | Direct device-to-device, multi-GB, resumable | AirDrop (Apple-only) |
| Where data goes | Straight across your LAN, no account | Through your iCloud session |
| Price | Free | Free (Apple hardware only) |
SwarmSpan complements Universal Clipboard — keep using Apple's for your iPhone and iPad, and let SwarmSpan carry the clipboard the one place Apple won't: across to your PC.
Ctrl+Alt+V on Windows or Control+Option+V on macOS to open a shared, searchable history and paste any recent item into the app in front of you.
SwarmSpan is free and local-first — the device bridge for SwarmMarshal, the communication workbench that turns your inboxes, files, and contacts into fast, source-cited answers.