A single unbroken pen line wanders the sheet, crowding where soft shapes are dark and thinning where they catch the light, until a picture appears out of one stroke.
A single unbroken pen line wanders the sheet, crowding where soft shapes are dark and thinning where they catch the light, until a picture appears out of one stroke.
In the app you can adjust the paper, ink, draw speed and detail. 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 One Line 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.
One Line FAQ
How do I set One Line as my screensaver on a Mac?
Install SCRNSVRS free from the Mac App Store, select One Line 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 One Line as a live wallpaper?
Yes. Click Set as Wallpaper in SCRNSVRS and One Line plays on your desktop behind your windows and icons. You can use it as screensaver and wallpaper at the same time.
Is One Line free?
One Line 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 One Line a video loop?
No. One Line 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 One Line 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 One Line costs next to nothing in everyday use.
Which Macs does One Line run on?
One Line needs macOS Tahoe 26 or later.
