A dark room with one vertical slit of warm light that slowly widens into a soft band and closes again like a door left ajar, its glow fanning across an unseen floor.
A dark room with one vertical slit of warm light that slowly widens into a soft band and closes again like a door left ajar, its glow fanning across an unseen floor.
In the app you can choose the colours, cycle and glow, and set how wide the slit can open. 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 Light Slit 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.
Light Slit FAQ
How do I set Light Slit as my screensaver on a Mac?
Install SCRNSVRS free from the Mac App Store, select Light Slit 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 Light Slit as a live wallpaper?
Yes. Click Set as Wallpaper in SCRNSVRS and Light Slit plays on your desktop behind your windows and icons. You can use it as screensaver and wallpaper at the same time.
Is Light Slit free?
Light Slit 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 Light Slit a video loop?
No. Light Slit 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 Light Slit 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 Light Slit costs next to nothing in everyday use.
Which Macs does Light Slit run on?
Light Slit needs macOS Tahoe 26 or later.
