How do I update the MX Master 3S firmware safely?

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

Problem

Your MX Master 3S may need a firmware update to fix bugs, improve performance, or add compatibility. You are unsure how to start the update, what to do if it stalls, or how to avoid losing settings or bricking the device.

Solution

Use Logi Options+ to check for and install updates with the mouse charged and connected to the computer. Keep the computer awake, connect a USB-C cable during the update if prompted, and avoid unplugging receivers or changing Easy-Switch channels. If the update fails, retry after a clean restart and stable connection.

Step-by-step instructions

1) Prepare the mouse and computer

1. Charge the MX Master 3S to at least 50 percent.
2. Turn off battery savers on laptops for the duration of the update.
3. Close other mouse software that might capture inputs.
4. If possible, connect the included USB-C cable so the mouse stays powered and awake.

2) Open Logi Options+ and check for updates

1. Launch Logi Options+.
2. Select MX Master 3S.
3. Look for an Update available banner or open the device menu and choose Firmware Update.
4. Read any release notes so you know what is changing.

3) Run the firmware update

1. Click Update and follow on-screen prompts.
2. Keep the mouse close to the computer if you connect through Bluetooth or Logi Bolt.
3. Do not switch Easy-Switch channels during the process.
4. If Options+ asks to connect the USB-C cable, plug it in and continue.
5. Wait until Options+ shows Update complete before touching anything.

4) Update the Logi Bolt receiver if offered

1. If you use a Logi Bolt receiver, Options+ may offer a separate receiver firmware update.
2. Insert the receiver directly into a USB port or a short extension cable and run the update.
3. Keep the mouse nearby and do not remove the receiver until done.

5) Verify the result

1. In Options+, confirm the firmware version now shows as current.
2. Test pointer movement, clicks, scroll wheel, thumb wheel, and gestures.
3. Open your app-specific profiles to confirm mappings still work.

6) If the update fails or stalls

1. Leave it for a few minutes to make sure it is not still processing.
2. Cancel if available, then exit Options+.
3. Reboot the computer and power cycle the mouse.
4. Reconnect through the same method you plan to use during the update, preferably with the USB-C cable attached.
5. Try again in Options+.
6. If it still fails, switch from Bluetooth to Logi Bolt or vice versa and retry with the mouse close to the receiver.
7. Temporarily disable VPNs or strict firewalls that may block device services.

Optional methods or tools

• USB-A extension cable for the receiver to improve signal quality during wireless updates.
• Wired USB-C connection for maximum stability.
• System power settings set to never sleep for the next hour to prevent interruptions.
• Local administrator account if corporate restrictions block device firmware operations.

Best practices or tips

• Update Options+ first, then update the mouse. Newer app versions often include device update fixes.
• Back up or sync your Options+ profiles to your Logitech account so you can restore mappings easily after an update or reinstall.
• Run updates when you have ten minutes of uninterrupted time and the laptop is on AC power.
• Avoid USB hubs with heavy traffic during the update. Use a direct port or a short, good quality extension.
• After updating, restart Options+ and the operating system if anything feels off, then retest.

Keeping the MX Master 3S firmware current can resolve stutter, improve battery reporting, and refine scroll behavior. The most important factors for a smooth update are stable power, a reliable connection, and patience while Options+ flashes the device. A quick wired connection during the process eliminates most hiccups.

If something goes wrong, a retry after a clean reboot usually succeeds. Switch to a different connection method if needed, keep the receiver close, and ensure security tools are not interfering. With a stable path and a charged mouse, firmware updates are straightforward and low risk, and they help your MX Master 3S perform at its best.