How can we help?

1. Download and install OneCursor on every computer you want to use (they must be on the same network).

2. Open OneCursor. The first time, the "Apple could not verify…" (Mac) or "Windows protected your PC" warning may appear — see how to open it the first time.

3. On the main computer, paste your license key (see How to activate) — or click Use for free (2 computers). Computers that are only controlled don't need a key: just click Use for free on them.

4. OneCursor asks how this computer will be used. Choose Main computer on the one with the mouse and keyboard you use, and Secondary computer on the others. Leave Open OneCursor by itself when this computer starts checked, so it keeps working after a restart.

5. That's it. The main computer finds the others on the network and adds them to its screen layout; the others connect by themselves. The first time each computer connects, the main computer shows a 6-digit PIN — type it on the other computer.

6. Move the mouse past the edge of your screen to go to the next computer. In Screen layout you can drag each computer to the side where it sits on your desk.

After purchase you get your license key on the confirmation page and by email. It starts with ONEC-.

Open OneCursor, paste the whole key in the activation window and click Activate. Activation happens on your computer — no internet needed.

Use the same key on all your computers. Your plan defines how many computers work together (see Plans).

Sign in on the Account page with the email you used to buy: your keys are listed under Your licenses, with a copy button.

You can also search your inbox for the purchase email. Still nothing? Email us (address at the bottom of this page) from the email you used to buy.

Same network: both computers must be on the same Wi-Fi or cable network. Guest Wi-Fi networks usually block computers from seeing each other — use the main network.

Windows Firewall: if OneCursor shows "O Firewall do Windows está bloqueando o OneCursor", click Liberar no firewall and confirm. The Windows installer already does this for you.

VPN: turn off VPN apps on both computers while testing — they can hide your local network.

Check the role: in Servidor & Cliente, exactly one computer must be Principal; the others, Secundário.

Mac: if macOS asks whether OneCursor can find devices on your local network, click Allow (System Settings → Privacy & Security → Local Network).

macOS requires permission for any app to control the mouse and keyboard. Without it, OneCursor opens but nothing happens.

Open OneCursor → Advanced → System permissions. It shows Granted or Not granted for each permission, and a button to open the right place in System Settings:

• Accessibility — needed on every Mac.
• Input Monitoring — needed on the Mac that is your main computer.

After enabling, quit and reopen OneCursor.

After updating OneCursor, macOS may treat it as a new app and turn the permission off again. If the mouse stops working after an update, open Accessibility, select OneCursor, remove it with the − button, then add it back with + (or open OneCursor and turn it on again when asked).

Why this happens: OneCursor is a small independent app and isn't signed with an Apple or Microsoft certificate yet, so the system warns you the first time you open it. The app is safe, and you only need to do this once on each computer.

Mac (macOS 15 Sequoia or newer)

1. Open the OneCursor.dmg you downloaded and drag OneCursor into the Applications folder.

2. Open Applications and double-click OneCursor. A message says "Apple could not verify 'OneCursor' is free of malware…". Click Done (don't click "Move to Trash").

3. Open the Apple menu → System Settings → Privacy & Security.

4. Scroll down to the Security section. You'll see "'OneCursor' was blocked to protect your Mac." Click Open Anyway.

5. Type your Mac password (or use Touch ID) and click Open Anyway once more. OneCursor opens — from now on, it opens normally.

Don't see the "Open Anyway" button? It only appears for about an hour after step 2. Double-click OneCursor again, then go back to Privacy & Security.

Mac (macOS 14 Sonoma or older)

In Applications, right-click (or Control-click) OneCursor → Open → Open.

Mac says "OneCursor is damaged and can't be opened"

The download was flagged by macOS. Open Terminal (Applications → Utilities), paste the line below and press Return, then open OneCursor again:

xattr -dr com.apple.quarantine /Applications/OneCursor.app

Windows

If a blue window says "Windows protected your PC", click More info → Run anyway.

After opening it the first time, remember the Mac also needs the Accessibility permission.

Ctrl + Alt + arrow — sends control straight to the computer on that side (Plus and Max plans). From another computer, the arrow pointing back brings control home.

F9 — emergency key: brings control back to the main computer instantly.

Your own shortcuts (Plus and Max) — in Teclado & mouse → Atalhos personalizados, e.g. make Ctrl+Alt+1 send Cmd+Space to your Mac without moving the mouse there.

Scroll Lock — locks the cursor on the current computer (turn it on in Teclado & mouse).

Copy/paste shortcuts are adapted automatically between Mac (Cmd) and Windows (Ctrl).

On the computer being controlled, open Teclado & mouse → Rolagem and turn on Inverter a direção da rolagem. You can also make scrolling faster there.

Make sure sharing is on in Copiar & colar on both computers. Text and images are supported, up to 4 MB by default.

Copy on one computer, move to the other and paste. If it still doesn't work, check that both computers show as connected in Screen layout.

Lite: up to 3 computers. Plus: up to 5 computers, plus keyboard shortcuts to switch. Max: up to 15 computers. The count includes your main computer, and you can place several computers on the same side (for example, two to the left).

All plans are a one-time payment with a lifetime license. See plans and prices.

Everything sent between your computers (mouse, keystrokes, clipboard) is encrypted with TLS. A computer can only connect after you confirm a 6-digit PIN shown on the main computer, the first time.

OneCursor works only on your local network — nothing goes through our servers.

Purchases are processed by Paddle, our reseller, and Paddle's buyer terms apply. To request a refund, email us from the email you used to buy.