MX Master 4 on Mac — Full Control with LinguaX

The MX Master 4 is Logitech's 2025 flagship — same familiar shell as the 3S plus one new input, the Actions Ring, sitting under the index finger. On macOS, Logi Options+ hides most of the button surface behind app profiles. LinguaX gives you all ten mappable inputs directly, with per-app overrides, gesture layers, and push-to-talk on the Gesture button.

Pair in-browser (requires Chrome or Edge)

Or install LinguaX for macOS — first-time pairing handled natively, no browser required.

Download LinguaX for macOSLearn more about pairing

Not affiliated with or endorsed by Logitech. “Logitech”, “MX Master”, “Bolt”, “Unifying”, “Lightspeed” are trademarks of Logitech International SA, used descriptively for compatibility.

What you can map on the MX Master 4

Ten LinguaX slots — the same nine as the 3S, plus AR:

• Side 1 / Side 2 — the two thumb-side buttons. Default is Back / Forward.
• T (Gesture button) — the flat button behind the thumb rest. Logitech renamed the "Thumb button" to "Gesture button" on the 4; LinguaX still exposes it as T. Supports click, double-click, long-press, and four-directional swipe.
• AR (Actions Ring key) — new to the MX Master 4. Sits on top of the shell under the index finger. LinguaX treats it as a standard mappable slot with the full gesture layer, so anything you'd put on a side button works here — with the ergonomic advantage that the index finger doesn't have to leave its resting position.
• WL / WR (thumb wheel) — the horizontal thumb wheel above the side buttons. Reports as AC Pan horizontal scroll; LinguaX reads left and right ticks as discrete buttons.
• SM (Scroll Mode) — the small button behind the wheel that switches between ratchet and free-spin MagSpeed. LinguaX lets SM carry a second action while still toggling wheel mode.
• Wheel click — the middle button.

Every slot supports the full gesture layer (click / double-click / long-press / directional swipe), so a single physical button can carry three or four distinct actions. See Gesture Mapping.

What Options+ can't do here

• Push-to-talk. Options+ has no "hold to speak, release to stop." LinguaX's long-press gesture on the Gesture button (or on AR) is a full physical PTT switch for Superwhisper, Wispr Flow, Zoom, Discord, or macOS Dictation.
• Directional swipe on Actions Ring. Options+ ties AR to context profiles it maintains itself. LinguaX makes AR just another slot — swipe left / right / up / down each fires a different action, with an on-screen indicator while you drag.
• Per-app overrides by bundle ID. Options+ needs the target app to be actively supported. LinguaX overrides by bundle ID whether the app is "recognised" or not. See App-scoped Overrides.
• Modifier-hold. Treat Side 1 or AR as "held Cmd" while pressed, so Cmd-click flows work one-handed.
• No account, no background service. Options+ pesters you to sign in and runs Electron in the background. LinguaX is ~10 MB native and stores no cloud state.

Broader writeup: Logi Options+ Alternative for macOS.

Three ready-to-copy setups

1. Push-to-talk on the Gesture button

The Gesture button on the 4 sits exactly where a mechanical PTT switch would go on a headset. The long-press gesture with a 200 ms threshold turns it into one:

1. In Mouse+, pick your MX Master 4 from the device list.
2. Assign T long-press → Hold the shortcut your voice tool uses (Superwhisper defaults to Fn; Wispr Flow uses ⌥; Zoom's PTT is Space when muted).
3. Optionally assign T click to a "quick capture" note action so a single tap does something too.

Full setup with app choices: Push-to-Talk on Mac Without a Keyboard.

2. Bind Actions Ring to your most-used shortcut

AR sits under the index finger — the fastest button on the mouse to reach without moving the hand. Put your single most-frequent action here:

• Global: AR click → your launcher (Raycast, Alfred, Spotlight)
• AR long-press → screenshot to clipboard (⌃ ⇧ ⌘ 4)
• AR swipe-up / swipe-down → volume up / down

Because AR is a fresh slot the muscle memory is a blank slate — good candidate for whatever shortcut you keep meaning to learn but never do.

3. Switch macOS Spaces with a side-button swipe

Same recipe as the 3S — the 4's Side 1 sits at the same angle:

• Side 1 swipe-left → ⌃ ← (Space left)
• Side 1 swipe-right → ⌃ → (Space right)
• Side 1 click → Back (keep the default so you don't lose Back navigation)

Setup in three minutes

1. Install LinguaX. Download the ~10 MB build from Installation and drag it to Applications.
2. Connect the MX Master 4. Either pair over Bluetooth in System Settings, or plug in a Bolt receiver. New Bolt receiver? Use the in-browser pairing tool — no Options+ install needed.
3. Open Mouse+. LinguaX picks up the 4 automatically and shows all ten named slots, AR included.
4. Apply a recipe. Start with one of the three above. Refine over the next few sessions.

First-time permission prompts are covered in First Run.

MX Master 4 vs MX Master 3S

	MX Master 4	MX Master 3S
Configurable slots	10 (adds AR)	9
Actions Ring	Yes (AR)	—
Gesture / Thumb button	Yes (T, renamed "Gesture button")	Yes (T, "Thumb button")
MagSpeed wheel + SM	Yes	Yes
Thumb wheel (WL / WR)	Yes	Yes
DPI	Up to 8000	Up to 8000
Battery (LinguaX tray)	Yes (BLE + Bolt)	Yes (BLE + Bolt)

If you're already comfortable on the 3S, moving to the 4 is a pure superset — every recipe you use still applies, with AR as a bonus slot.

Compatibility notes

• Firmware: LinguaX reads HID++ 2.0 from any 4 firmware Logitech has shipped. AR is exposed as a standard mappable slot; no separate firmware unlock.
• Battery reading: Shown in the tray over Bluetooth and Bolt.
• Sleep / wake: Auto-reconnects after macOS sleep; mappings re-apply without a manual reload.
• Multi-host: The 4's Easy-Switch button toggles between three paired hosts; LinguaX keeps a separate profile per host.

FAQ

Does the MX Master 4 work on macOS without Logi Options+? Yes. macOS handles movement and clicking out of the box. LinguaX adds proper Side, Gesture, Scroll Mode, wheel tilt, and Actions Ring mapping without a Logitech account or Electron background service.

What is the Actions Ring on the MX Master 4? A new input on top of the shell, under the index finger. In LinguaX it's the AR slot — a plain mappable button with the same gesture layer as any other Mouse+ slot.

What's different between MX Master 4 and MX Master 3S? Same physical layout — thumb rest, MagSpeed wheel, thumb wheel, Gesture button — plus one new input, Actions Ring (AR). Everything you can map on the 3S maps on the 4; AR is the addition.

Bluetooth or Bolt receiver on Mac? For one Mac, Bluetooth is simpler. If you swap Macs or want cleaner sleep/wake recovery, the Bolt is more predictable. LinguaX reads full HID++ over both.

How many devices can I pair to one Bolt receiver? Six per receiver. Hit the limit and you'll need to unpair an unused device — LinguaX's in-browser pairing tool can unpair as well as pair, no Logitech software required.

Get started

LinguaX is a free download with a 30-day trial — no account, no telemetry. If it fits, it is a $9.9 one-time purchase covering 3 devices (no subscription).

Download LinguaX and set up your MX Master 4 free for 30 days.

Related pages

• Coming from Logi Options+? The MX Master 3S migration guide applies to the 4 with the AR addition on top.
• MX Master 3S — previous generation. Same shell and gestures, minus AR.
• MX Master 3 — two generations back. Louder wheel, lower max DPI.
• MX Anywhere 3S — travel-sized sibling. No AR, no thumb wheel, no Gesture button.
• All supported models: Compatible Models overview.