A clear slanted crystal rests on printed paper and every mark seen through it appears twice; as the crystal turns, one copy stays put while the other slowly circles around it.
A clear slanted crystal rests on printed paper and every mark seen through it appears twice; as the crystal turns, one copy stays put while the other slowly circles around it.
In the app you can adjust the colours, pattern, turn speed and crystal tint. 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 Double Refraction 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.
Double Refraction FAQ
How do I set Double Refraction as my screensaver on a Mac?
Install SCRNSVRS free from the Mac App Store, select Double Refraction 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 Double Refraction as a live wallpaper?
Yes. Click Set as Wallpaper in SCRNSVRS and Double Refraction plays on your desktop behind your windows and icons. You can use it as screensaver and wallpaper at the same time.
Is Double Refraction free?
Double Refraction 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 Double Refraction a video loop?
No. Double Refraction 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 Double Refraction 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 Double Refraction costs next to nothing in everyday use.
Which Macs does Double Refraction run on?
Double Refraction needs macOS Tahoe 26 or later.
