Tens of thousands of agents that follow each other's trails – the Physarum slime-mould model – weaving themselves into a living network of glowing veins.
Tens of thousands of agents that follow each other’s trails – the Physarum slime-mould model – weaving themselves into a living network of glowing veins.
In the app you can adjust the agents and colour. It runs natively on your Mac, drawn live in real time – no video, never quite the same twice.
Use it on your Mac
- Get SCRNSVRS free from the Mac App Store.
- Select Slime Mould in the library.
- Click Set as Screensaver or Set as Wallpaper – or both.
Preview free · macOS Tahoe 26 or laterNeed a hand? Read the setup guide.
Slime Mould FAQ
How do I set Slime Mould as my screensaver on a Mac?
Install SCRNSVRS free from the Mac App Store, select Slime Mould in the library and click Set as Screensaver. macOS starts it whenever your Mac is idle, exactly like a built-in screensaver.
Can I use Slime Mould as a live wallpaper?
Yes. Click Set as Wallpaper in SCRNSVRS and Slime Mould plays on your desktop behind your windows and icons. You can use it as screensaver and wallpaper at the same time.
Is Slime Mould free?
Slime Mould is included in SCRNSVRS Unlimited. It's free for your first 7 days; after that Unlimited is $1.99/month or $9.99/year (€1.99/month or €9.99/year) for every screensaver, including new ones. It can also come up in Free this month, when 25 premium screensavers are free for everyone.
Is Slime Mould a video loop?
No. Slime Mould is rendered live on your Mac with Metal, so it never repeats and stays sharp on any display size. The clip on this page is a screen recording of the real thing.
Will Slime Mould slow down my Mac or drain the battery?
No. SCRNSVRS drops to 30 fps on battery and stops rendering when the wallpaper is covered by a full-screen app, so Slime Mould costs next to nothing in everyday use.
Which Macs does Slime Mould run on?
Slime Mould needs macOS Tahoe 26 or later.
