GoKawiilMouser — MX Master 3S Button Remapper
A lightweight, open-source, fully local alternative to Logitech Options+ for remapping every programmable button on the Logitech MX Master 3S mouse.
No telemetry. No cloud. No Logitech account required.
Features
macOS support — full macOS compatibility added thanks to andrew-sz , using CGEventTap for mouse hooking, Quartz CGEvent for key simulation, and NSWorkspace for app detection. See macOS Setup Guide for details.
— , using CGEventTap for mouse hooking, Quartz CGEvent for key simulation, and NSWorkspace for app detection. See macOS Setup Guide for details. Remap all 6 programmable buttons — middle click, gesture button, back, forward, horizontal scroll left/right
— middle click, gesture button, back, forward, horizontal scroll left/right Per-application profiles — automatically switch button mappings when you switch apps (e.g., different bindings for Chrome vs. VS Code)
— automatically switch button mappings when you switch apps (e.g., different bindings for Chrome vs. VS Code) 22 built-in actions across navigation, browser, editing, and media categories
across navigation, browser, editing, and media categories DPI / pointer speed control — slider from 200–8000 DPI with quick presets, synced to the device via HID++
— slider from 200–8000 DPI with quick presets, synced to the device via HID++ Scroll direction inversion — independent toggles for vertical and horizontal scroll
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