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

by Jax Dalton · Published 29/10/2025 · Updated 30/10/2025

Applies to / Last updated
Logitech MX Master 3S • Logi Options+ on Windows 10/11 and macOS 12+ • Last updated: 29 October 2025

Problem

You want to make sure your MX Master 3S has the latest fixes and features. You are unsure where firmware updates appear in Logi Options+, what to do if the update stalls, and how to avoid disconnects or data loss during the process.

Solution

Use Logi Options+ to check for and install updates with the mouse charged and connected to a stable link. Keep the receiver close or use the USB-C cable during the update, allow any permissions that Options+ requests, and avoid sleeping or shutting down the computer until the process completes.

Step-by-step instructions

1) Prepare the mouse and computer

Charge the MX Master 3S to at least 30 percent, or connect it with the included USB-C cable.
If you use a Logi Bolt receiver, plug it into a direct USB port or a short USB extension so it sits near the mouse.
Close heavy background tasks and pause large downloads to reduce the chance of the system sleeping or throttling.

2) Open Logi Options+ and check for updates

Launch Logi Options+.
Select your MX Master 3S.
Look for an Update available prompt. If you do not see one, open the device menu and choose Check for updates.
Review the notes, then click Update.

3) Grant required permissions

Windows: If prompted by User Account Control, choose Yes.
macOS: If requested, grant Accessibility and Input Monitoring permissions for Options+ and its helper, then return to Options+ and resume.

4) Keep the link stable while updating

Keep the mouse awake by moving it gently every 10 to 15 seconds if the process is long.
Do not unplug the USB-C cable or the Logi Bolt receiver during the update.
Do not let the computer sleep. On laptops, connect to AC power.

5) Wait for completion and verify

Options+ will show Success and the mouse will reconnect.
Test buttons and scrolling.
In Options+, open the device menu to confirm the firmware version has changed.
If offered, also update the Logi Bolt receiver firmware.

6) If the update fails or gets stuck

Toggle the mouse Off and On, then retry the update.
Move the receiver closer or switch to the USB-C cable and retry.
Try another USB port and close VPNs or security tools that may block device communication.
Restart the computer and run Options+ again.
As a last step, remove the mouse in Options+, re-pair it, and attempt the update once more.

Optional methods or tools

USB-C wired update: If wireless links are unstable, keep the mouse connected by cable during the update.
Portable power: If you must update on battery, ensure the system power plan prevents sleep.
Spare receiver: If a receiver update repeatedly fails, test with another Logi Bolt receiver to isolate the issue.

Best practices or tips

Schedule updates during a non-critical window, because the mouse will momentarily disconnect.
Enable cloud backup inside Options+ so your button mappings and profiles are preserved if you need to re-pair after an update.
Keep both mouse and receiver firmware current for the best stability, especially if you use Flow or multi-device switching.
Avoid updating over long USB hub chains. A short USB extension that brings the receiver to desk level is usually more reliable.

Firmware updates often deliver smoother scrolling, better wireless stability, and compatibility fixes for new versions of Windows and macOS. Performing the update with the mouse charged, the receiver nearby, or the USB-C cable attached removes most risk. Once complete, verify your profiles still behave as expected and take a moment to test gestures and Smart Actions.

If an update does not complete on the first try, the cause is usually a flaky radio link, a sleeping laptop, or a security policy that interrupts the process. Switching to a wired connection, preventing sleep, and closing VPNs or device control tools normally resolves the issue. Keep Options+ and firmware aligned across all your computers so multi-device features remain consistent.