CrosTem for Mac
BetaA menubar app that puts verdicts inside the Steam client itself — and an Overview that tells you how much of your library runs on your Mac.
For you if you buy and play through the Steam app on your Mac.
FreeOpen sourceNo telemetry
Does it run on my Mac?
CrosTem tells you before you hit Buy: one clear verdict on every game, drawn from CrossOver ratings, AppleGamingWiki and anti-cheat reports — in the Steam client on your Mac, or in your browser.
Download for MacBeta
Buying a Mac game shouldn't take three tabs
Checking one game used to mean CodeWeavers, AppleGamingWiki and an anti-cheat tracker — then reconciling their answers yourself.
Before
Three databases, three searches, three answers to reconcile — for every game on your wishlist.
With CrosTem
One verdict, already on the page you're looking at.
Two ways to get the answer
Same verdicts, same three sources — pick where you want them.
CrosTem for your browser
BetaAn extension that adds the same verdicts to the Steam website in Chrome, Brave or Edge — game pages, search, wishlist and capsules.
For you if you browse the Steam store in your browser.
How it works
No account, no setup — install it and the answer is just there.
Install CrosTem
The Mac app for the Steam client, the extension for Chrome, Brave or Edge — or both. Either way it's free, open source and ready in a minute.
Browse Steam as usual
Game pages, search results, sales, your wishlist — CrosTem looks up every game you see, quietly and in the background.
Read the verdict
A conservative traffic light, with each source's raw status right below it so you can judge for yourself — before you hit Buy.
The verdict, at a glance
- Green — play it today, natively or via CrossOver.
- Amber — playable with caveats; check the details.
- Red — likely unplayable, usually because of anti-cheat.
- Grey — no data yet; the sources don't know this game.
- 2apps — one for the Steam client, one for the browser
- 3data sources
- 30languages
- 0telemetry — everything stays on your machine
Open source, nothing to hide
The privacy claims aren't promises — they're in the code, and the code is public.
GPL-3.0-or-later
Free software, forever. The license guarantees CrosTem stays free and open, whoever maintains it.
Audit it yourself
Every line that runs on your machine is on GitHub — the verdict logic, the caching, all of it.
A tiny footprint
The extension asks for one browser permission: storage. The Mac app keeps everything in one local folder. No tabs, no history, no accounts.
Private by design
No accounts, no servers, no telemetry. CrosTem fetches public compatibility pages and caches them on your machine — that is the whole footprint.
Stop juggling three databases in three tabs.
Get the answer where you already are: in the Steam client on your Mac, or right on the store.
Download for MacBeta