How do I reset or re-pair my Logitech MX Master 3S?

Applies to / Last updated
Logitech MX Master 3S • Windows 10 or 11 • macOS 12 or later • Logi Options+ • Last updated: 30 October 2025

Problem

Your MX Master 3S will not reconnect to a computer, it connects to the wrong device, or it keeps dropping the link. You want to clear old pairings and set up a clean connection using Bluetooth or a Logi Bolt receiver without losing your button customizations.

Solution

Remove the mouse from the computer’s Bluetooth devices list or from Logi Options+ if you use a Logi Bolt receiver, then put the MX Master 3S into pairing mode on a chosen Easy Switch channel and add it again. If the issue persists, pair it on a different channel, move any receiver closer on a short USB extension, and update firmware in Logi Options+.

Step-by-step instructions

1) Decide which connection you want to fix

• Bluetooth on Windows or macOS
• Logi Bolt receiver on Windows or macOS

2) Forget and re-pair over Bluetooth

On Windows 10 or 11

1. Open Settings then Bluetooth and devices.
2. Find MX Master 3S, click More options then Remove device.
3. Toggle Bluetooth off then on to refresh the list.
4. On the mouse, press the Easy Switch button to select a channel, then hold it for 3 seconds until the LED blinks rapidly.
5. In Windows, click Add device then Bluetooth and select MX Master 3S to pair.

On macOS 12 or later

1. Open System Settings then Bluetooth.
2. Click the i next to MX Master 3S and choose Forget or Remove.
3. Toggle Bluetooth off then on.
4. Put the mouse in pairing mode on your chosen channel by holding Easy Switch for 3 seconds.
5. Click Connect next to MX Master 3S when it appears.

3) Unpair and re-pair with a Logi Bolt receiver

1. Plug the Logi Bolt receiver into a direct USB port. Prefer a front port or a short USB extension so it sits near the mouse.
2. Open Logi Options+ and select the receiver or your MX Master 3S.
3. Choose Remove or Forget to clear the existing binding if present.
4. Click Add device and choose Logi Bolt receiver.
5. On the mouse, select a channel and hold Easy Switch for 3 seconds until the LED blinks rapidly.
6. When MX Master 3S appears in Options+, select it to complete pairing.

4) Try a clean channel if problems continue

1. Press Easy Switch to move to another channel number that you have not used.
2. Enter pairing mode again and add the mouse to the same computer on this new channel.
3. Once it works reliably, you can later reuse the original channel for another device.

5) Refresh Logi Options+ and firmware

1. Open Logi Options+ and sign in if you are not already.
2. Go to the Firmware Update section for the mouse and receiver and install any updates.
3. Restart Options+ and test your button mappings. Your cloud synced profiles should return automatically after sign in.

6) Quick checks if re-pairing fails

• Move within 20 to 30 cm of the computer or receiver.
• Try a different USB port for the receiver.
• Temporarily disable VPN and allow Options+ through the firewall.
• Power cycle the mouse with the switch on the underside and retry.
• Test on another computer to identify whether the issue is host specific.

Optional methods or tools

• Short USB extension for the Logi Bolt receiver to reduce interference from metal cases and USB 3 cables.
• Wired USB C charging during troubleshooting to make sure low battery is not a factor.
• Per app profile sync in Options+ so your mappings return automatically after any reinstall.

Best practices or tips

• Keep one Easy Switch channel per device to avoid confusion.
• Label devices in Options+ so you know which computer each channel belongs to.
• If you split time between two machines, consider Logi Bolt on your main computer and Bluetooth on the other to minimize radio contention.
• Keep Options+ and firmware updated for stability fixes.
• Place receivers away from dense cabling and Wi Fi routers and avoid unpowered hubs for critical connections.

Resetting a flaky connection usually comes down to clearing the old pairing on both ends and starting fresh on a known channel. Doing this through the operating system for Bluetooth or through Logi Options+ for a Logi Bolt receiver removes stale keys and forces a clean handshake. A nearby receiver on a short extension often eliminates lag or dropouts caused by case shielding.

Once re-paired, confirm the mouse is on the intended channel and that Options+ recognizes it so your custom buttons and gestures load. If reconnect issues return after sleep, adjust USB power saving on Windows, allow Options+ at login on macOS, and keep the receiver in clear view. With those fundamentals in place, the MX Master 3S reconnects quickly and stays stable.