Applied
Free and open source
One wallpaper across every monitor
macOS gives every monitor its own wallpaper. SpreadPaper gives them one picture, carried on over the frames instead of starting again on each screen. Keep it still, pair a light one with a dark one, or run a whole day on a schedule.
- Version
- 1.10.1
- Download
- 74 MB
- Requires
- macOS 15
- Licence
- MIT
One picture cut to the shape of the desk, carried on over the frames and across the gaps.
Three kinds
Change with the day, with the light, or not at all
Every wallpaper SpreadPaper makes is one photograph laid across the displays you actually have, however many that is. What changes between the three kinds is how many photographs you hand it, and what decides when they change.
Two of the three ask for no second display at all. A Light and Dark pair and a day on a schedule are worth having on a single screen, and a laptop on its own is a perfectly ordinary way to run this.
- 06:00Sunrise
- 12:00Midday
- 18:00Evening light
- 23:00The Milky Way
Dynamic, up to 16 images
A whole day on a schedule
Up to 16 photographs, each with a start time you set on the clock. SpreadPaper writes them into a HEIC dynamic desktop carrying the time metadata macOS reads, so every screen turns over at the same moment.
- LightThe beach
- DarkThe palms
Light & Dark, two images
A pair that follows the appearance
Hand SpreadPaper two photographs, one for light appearance and one for dark. Switch your Mac yourself and the wallpaper follows on every display at once. Set Appearance to Auto and macOS makes the switch on the same schedule Night Shift runs on.
Static, one image
One photograph, every display
Drag a wide photograph into place on a canvas that mirrors your real display arrangement, and it goes up as one continuous picture. It stays there until you change it.
The editor
Place the wallpaper exactly where your monitors sit
The canvas is your desk: the same sizes, the same order, the same gaps. Drop a wallpaper on it and drag until it sits where you want it.
Zoom, fit and flip
Zoom between 10 and 300 per cent, fit the wallpaper to the canvas in one click, and mirror it when the composition reads better the other way round.
One file for every screen
Every display gets its own rendered file, keyed on the display ID rather than the name, so two identical monitors never share one wallpaper.
Look before you save
Preview puts it on your screens with the editor still open. Save keeps it as a preset, and Save & Apply does both at once.
Bezel compensation
The picture carries on behind the monitor bezels
Monitor bezels sit in the middle of a spread photograph. SpreadPaper pushes the displays apart by the width of the bezel between them, so a ridge meets on the far side instead of jumping. Give every display the same width, or each one its own, and monitors of different sizes and resolutions still line up.
Drag it until the ridge lines up. That is the same judgement you make in the app, so there is nothing to measure.
The gallery
Every wallpaper you make stays one click away
Saving writes a preset: the image, where you put it, the zoom, the flip, and the times if it runs on a schedule. The gallery lists them all with a thumbnail, and marks the one that is on your screens right now.
Narrow the list to one kind from the sidebar, or search it by name. Every card carries a menu that renames a preset, duplicates it, shows its image in Finder, or deletes it and leaves the image exactly where it was.
Beach, day and night
Light & DarkA day outside
DynamicNight ridge
Static
Download
Download SpreadPaper, free and open source
SpreadPaper is a native macOS app released under the MIT licence. Every version ships from GitHub as a DMG and a ZIP, with no account to make and nothing to pay for.
What it needs
- macOS
- 15.0 Sequoia or later
- Mac
- Intel or Apple silicon
- Displays
- One is enough for a Light and Dark pair or a day on a schedule. Two or more to carry one photograph across them
- Download
- DMG or ZIP, from the GitHub releases page
- Licence
- MIT, free and open source
On an Intel Mac or an older macOS? Open a feature request and say so.
Apple could not verify SpreadPaper is free of malware
That is the wording macOS uses for any app not signed with a paid Apple Developer ID, and SpreadPaper is not signed with one. Nothing has been found in SpreadPaper, and nothing has been scanned: the check is for a signature, not for malware. You do not have to take that on trust, because the source is public and every release is built from it by GitHub Actions.
There are two ways past it, one through System Settings and one in Terminal. Both are written out step by step in how to open SpreadPaper when macOS blocks it. It takes a minute, and only the first time.