OpenLogi

Good to see open source alternatives to the awful Logitech software. I only realized how bad the Logitech software is after switching from a G502 with on-board memory to an MX Master mouse that does not have on-board memory and needs to have the app constantly running in the background to use the gestures. Personally I've been using BetterMouse on macOS with my MX Master, although it's not open source.

For Linux, there is https://github.com/pwr-Solaar/Solaar

But on another note, the genai content on the website is just so distracting and such a bummer. It sticks out like sore thumb.

In case it’s not known, Logitech does offer an offline version of Options+ meant for air gapped and more secured systems:

https://support.logi.com/hc/change_language/en-in?return_to=...

Looks like someone stole LinearMouse's code and vibed it better . https://linearmouse.app/zh-CN/

It's not open source but I have to shout out Steermouse which has been replacing Logitech's awful Mac software for ~25 years

https://www.plentycom.jp/en/steermouse/download.php

Cool project, but I hate how every new site has this obviously LLM generated copy :( I feel like most people who use it for their copy don’t realize how obvious it is.

Love my Logitech mouse, keyboard, and webcam. Their software not in the same league as their hardware.

- stupid question: what exactly does this do and why do I need it?

In case author is here, Under resources tab at the footer, Introduction anchor is not in english

For Linux, there is https://github.com/pwr-Solaar/Solaar

But on another note, the genai content on the website is just so distracting and such a bummer. It sticks out like sore thumb.

Solaar is fantastic software. Not worth replacing with slop even if the slop looks shiny.

In case author is here, Under resources tab at the footer, Introduction anchor is not in english

In case it’s not known, Logitech does offer an offline version of Options+ meant for air gapped and more secured systems:

https://support.logi.com/hc/change_language/en-in?return_to=...

Looks like someone stole LinearMouse's code and vibed it better . https://linearmouse.app/zh-CN/

It's not open source but I have to shout out Steermouse which has been replacing Logitech's awful Mac software for ~25 years

https://www.plentycom.jp/en/steermouse/download.php

Cool project, but I hate how every new site has this obviously LLM generated copy :( I feel like most people who use it for their copy don’t realize how obvious it is.

Love my Logitech mouse, keyboard, and webcam. Their software not in the same league as their hardware.

- stupid question: what exactly does this do and why do I need it?

Solaar is fantastic software. Not worth replacing with slop even if the slop looks shiny.

I maintain a homebrew tap for the offline Options+: https://github.com/gohanlon/homebrew-tap

The tap includes a GH action to track upstream releases (as long as I notice the PR!). Also, the offline version only compensates for some of the issues with Options+.

Logitech's offline installer is 1.2GB. This application's installer is 15.3MB.

You can't vibe things better. You vibe them shinny, but often make them worst.

This is my favorite. It Just Works with every mouse I throw at it and supports a ludicrous amount of button customization.

Oh it’s not just the site—the app is obviously LLM generated too and feels like it. I gave up and went back to Mos within 20 minutes.

People realize, but writing good technical prose is hard and a separate skill.

it's pretty much "load bearing" at this point.

I once heard a story about an old Logitech webcam driver in windows. Once it was installed, it would always scan for the webcam and if it wasn’t detected it would write to an error log. So if you set up the webcam once and then got rid of it without uninstalling the driver it would always dump logs upon logs. Eventually a user had their entire disk space filled and when they dug into it they found a single tens or hundreds of GB log file. Uninstalling the driver fixed it.

Logitech mice and keyboards have extra features that the OS would consider non-standard; you can customize a lot of behaviors as well as map extra buttons to specific actions. For some reason, Logitech decided not to store customization settings on-device so there is a background daemon that must run on the host. Also inexplicably, it is an electron app with a 600MB install footprint requiring online connectivity (apparently there's also an offline version, weighing in at 1.2GB). Also not available on Linux.

I maintain a homebrew tap for the offline Options+: https://github.com/gohanlon/homebrew-tap

The tap includes a GH action to track upstream releases (as long as I notice the PR!). Also, the offline version only compensates for some of the issues with Options+.

You can't vibe things better. You vibe them shinny, but often make them worst.

This is my favorite. It Just Works with every mouse I throw at it and supports a ludicrous amount of button customization.

it's pretty much "load bearing" at this point.

Logitech's offline installer is 1.2GB. This application's installer is 15.3MB.

People realize, but writing good technical prose is hard and a separate skill.

Oh it’s not just the site—the app is obviously LLM generated too and feels like it. I gave up and went back to Mos within 20 minutes.

You want "Onboard Memory Manager", which is 12 megs.

I don’t think it’s that hard; it just takes effort. And the effort is well worth it.

There's good technical prose on the site? It's all just fluff marketing that adds nothing.

At this point we should be sharing prompts not code for solutions like OpenLogi. Reverse engineering many things can typically be one-shotted (ignoring things like.. capturing a pcap or whatever to aid the effort). Let others add their own taste to the solution.

I don’t think it’s that hard; it just takes effort. And the effort is well worth it.

There's good technical prose on the site? It's all just fluff marketing that adds nothing.

You want "Onboard Memory Manager", which is 12 megs.

That only works with "G" brand gaming devices. Their entire MX line does not allow you to store customizations in onboard memory.

**HID++**BoltUnifyingBluetoothUSB

Your Logitech mouse, finally local.

A native, local-first alternative to Logitech Options+, written in Rust. Remap buttons, drive DPI and SmartShift over HID++. No account, no telemetry.

Download

$brew install --cask openlogi

.dmg.deb / .rpm / .pkg.tar.zst.msiMIT / Apache-2.0Not affiliated with Logitech

The OpenLogi app remapping an MX Master 4's buttons over HID++

Click a button. Bind an action. Done.

This is the heart of the app: an interactive mouse diagram with clickable hotspots and a per-button action picker. Try it right here: pick a hotspot, then choose any of the built-in actions.

config.toml · schema_version = 2

MX Master 4

~/.config/openlogi/config.tomllive

schema_version = 2

selected_device = "2b042"

[devices.2b042.bindings]

MiddleClick = "MissionControl"

DpiToggle = "CycleDpiPresets"

Thumbwheel = "VolumeUp"

Forward = "BrowserForward"

Back = "BrowserBack"

GestureButton = "AppExpose"

MX Master 4Writes straight to config.toml, the file you own.

Everything Options+ does, without the account.

OpenLogi drives your mouse over HID++ directly: buttons, DPI and SmartShift, from a native app that never phones home.

HID++ 2.0 · 44 actions

Remap any button

Bind any of 44 built-in actions to each physical button, per device. Custom shortcuts, app launchers and scripted actions too.

DPI control & presets

Set pointer resolution and cycle your own presets, written straight to the sensor over HID++.

HID++ 0x2201

SmartShift

Flip the wheel between ratchet and free-spin, or let it switch automatically by scroll speed.

HID++ 0x2111

Per-app profilesComing soon

Per-application overlays that will auto-switch the moment your focused app changes. Landing in a later release.

Bolt, Unifying, Lightspeed, Bluetooth or wired

Reach devices over a Logi Bolt, Unifying or Lightspeed receiver, a direct Bluetooth pairing, or a USB cable. No receiver required.

Live device view

A carousel of paired devices with battery percentage and charge state for everything online.

HID++ 0x1004

Your mouse. Your machine. Nothing in between.

No account, no telemetry, no cloud. Bindings live in a plain TOML file you own, and every change is written straight to the device over HID++.

network · device renders only

Up and running in a minute.

Signed builds for macOS, Linux and Windows. Pick your platform below. Step-by-step setup lives in the docs.

.dmg · .deb · .rpm · .msi

macOS

$brew install --cask openlogi

Download .dmg

Homebrew is recommended, or grab the signed .dmg for Apple silicon or Intel.

Linux

Download .deb

Packages for amd64 and arm64, with .rpm and Arch .pkg.tar.zst builds also available.

Windows

New

Download .msi

Signed x86_64 and arm64 installers, validated on Windows 11, the newest port.

Quit Logi Options+ before launching: the two fight over HID++ access, and only one app can own a receiver at a time. On Linux, the same applies to Solaar.

Questions, answered.

Will OpenLogi support Logitech Flow?

It's on the roadmap, at the far end: a cross-computer pointer and clipboard bridge is a very large feature. The half that lives in the protocol already ships. OpenLogi drives Easy-Switch host switching over HID++ (0x1814/0x1815), and paired mice follow the keyboard when it switches hosts. If the rest lands, it will be opt-in and local-network only.

Can I pair a new device from OpenLogi?

Bolt pairing ships in the GUI, and Unifying and Lightspeed pairing is in progress. Until it lands, pair once with Logitech's tool or Solaar; OpenLogi drives the device from then on.

Can I import my Options+ settings?

Not yet, though an importer is in progress. In the meantime, bindings are a short TOML file you can rebuild in minutes, and unlike Options+ they stay in one portable, hand-editable file.

Why does macOS ask for Accessibility permission?

OpenLogi remaps the side buttons (Back, Forward, middle click) through a CGEventTap, and macOS puts event taps behind the Accessibility permission. The HID++ paths (gesture button, thumb wheel, DPI, SmartShift) don't need it.

How do updates work?

Only when you ask. The in-app update check is opt-in and off by default; new builds come from Homebrew (brew upgrade --cask openlogi) or the signed installers on the releases page.

Do my bindings move to another machine?

Copy the TOML file. Devices are keyed by physical identity (receiver serial and slot, or the device's own serial), so the same mouse keeps its bindings wherever the file goes. Built-in sync may come one day, but it's hard to square with the no-account principle.

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