# Mouser **Mouser** is a lightweight, open-source, fully local alternative to Logitech Options+ for remapping Logitech HID++ mice (e.g., MX Master 3S / 4). Written in [[Python]], MIT-licensed. Local-only means no cloud account, no telemetry, no bundled background services phoning home — the kind of footprint Options+ is criticized for. It runs on [[Linux]] and macOS, filling the gap left by Logitech officially supporting only Windows and macOS. ## Why it matters - First-class button remapping on [[Linux]] for HID++ mice — historically the weakest platform for Logitech users. - Removes dependency on Logitech's heavyweight proprietary stack. - Demonstrates the [[Open Source]] pattern of reverse-engineering vendor protocols to give users control of their own hardware. ## Source - GitHub: https://github.com/TomBadash/Mouser ## Related - [[Linux]] - [[Python]] - [[Open Source]]