NotProton
NotProton enables the Steam Play experience from Linux Steam in the macOS Steam client.
NotProton launched on 23 September 2026. It ranked #60 on Daily Launch on 17 October 2026 with a Launch Score of 30, from +66 stars on 17 Oct on GitHub. It was new in the ranking that day.
What is NotProton?
NotProton enables the Steam Play experience from Linux Steam in the macOS Steam client. This is done by forcibly enabling the Steam Play functionality in macOS Steam (which is present and inert) as well as by porting some components of Valve's Proton to macOS.
From its README on GitHub
NotProton is a repo by NotProtonNot on GitHub. It is written in Scala and released under the GPL-3.0 license.
How to get NotProton
Get it from its repository on GitHub.
In its own words
Steam Play for macOS
From its GitHub repository
Launch timeline
Launch Score, last 7 days
Ranked on one day so far: 30 of 100 on 17 October.