How to create a wallpaper slideshow on Mac

Same wallpaper every day gets stale. macOS has had wallpaper rotation built in for years — point it at a folder of images, tell it how often to switch, and your desktop stays fresh without any effort. Here's how to set it up, plus some tricks to make it work better.

Setting it up (macOS Ventura, Sonoma, Sequoia)

Open System Settings → Wallpaper
Click Add Folder and select a folder with your wallpaper images
Once added, the folder appears in your wallpaper list
Enable the slideshow/auto-rotate toggle
Pick how often you want it to change
Optionally turn on random order (otherwise it goes sequentially)

On older macOS (Monterey and earlier)

System Preferences → Desktop & Screen Saver → Desktop tab
Click + in the sidebar, add your folder
Check "Change picture" and pick your interval

How often should it change?

This depends on what you're using your Mac for:

Every 5 seconds — only makes sense as a photo frame when you're not working. Distracting otherwise.
Every 30 minutes — the sweet spot for most people. Fresh enough to notice, not so frequent it's disruptive.
Every hour — good for work environments. Subtle variety.
Every day — set it and forget it. New wallpaper each morning.
On login — changes only when you start your day. Consistent during work.
On wake from sleep — fresh view after breaks.

If you're doing focused work, longer intervals are better. If your Mac lives on a desk as ambient decoration, shorter intervals are fine.

Organizing your slideshow folder

The quality of your slideshow depends entirely on what's in the folder. A few tips:

20–50 images is the sweet spot. Fewer and you'll see repeats too often. More and you forget what's in there.
Keep resolution consistent. Mix a 6K photo with a 1080p image and the low-res one will look noticeably worse when it comes up.
Remove duds. If a wallpaper makes you want to skip it every time it appears, just delete it from the folder.
Watch the tonal range. If all your wallpapers are dark except one bright white one, that transition is jarring.

Themed folders

Instead of one giant folder, consider keeping separate collections:

Nature / landscapes
Abstract / minimal
Seasonal (swap the folder when the season changes)
Dark mode friendly

Switch which folder is active based on your mood or the time of year.

Multiple displays

If you have more than one screen, each can run its own slideshow from a different folder. In System Settings → Wallpaper, click the display you want to configure, then add a folder for that display specifically.

Make sure "Displays have separate Spaces" is enabled (System Settings → Desktop & Dock → Mission Control) — otherwise you can't set wallpapers independently.

Using Smart Folders

A neat trick: use a Finder Smart Folder as your slideshow source. Create a Smart Folder that finds all images matching certain criteria (resolution, file type, tags) and it updates automatically as you add new wallpapers.

Finder → File → New Smart Folder
Set criteria: Kind is Image, maybe minimum width or specific tags
Save the Smart Folder
Point your wallpaper slideshow at it

Now any new image that matches your criteria automatically joins the rotation.

Script-based rotation (advanced)

If the built-in timer isn't flexible enough, you can write a simple shell script:

#!/bin/bash
WALLPAPER_DIR="$HOME/Pictures/Wallpapers"
WALLPAPER=$(find "$WALLPAPER_DIR" -type f \( -name "*.jpg" -o -name "*.png" \) | shuf -n 1)
osascript -e "tell application \"System Events\" to tell every desktop to set picture to \"$WALLPAPER\""

Save this as a script and trigger it with a cron job or launchd agent for custom timing beyond what System Settings offers.

Resolution recommendations

For a smooth slideshow experience, all your images should meet or exceed your display's native resolution:

MacBook Pro 14" — 3024 × 1964 minimum
MacBook Pro 16" — 3456 × 2234 minimum
iMac 24" — 4480 × 2520 minimum
Studio Display — 5120 × 2880

JPEG is fine for photos (smaller files, loads faster). PNG for illustrations or flat graphics. Don't mix random low-res downloads with proper high-res wallpapers — the quality difference is obvious.

If curating a folder sounds like too much work, Wallpapery handles the rotation automatically with a curated collection — no folder management required.