What is com.apple.mobileAssetDesktop, and is it safe to delete?
- Location
~/Library/ Application Support/ com.apple.mobileAssetDesktop - Safe to delete?
- Yes, it rebuilds itself Downloaded Apple wallpapers. Switch wallpapers first and keep images you added yourself.
com.apple.mobileAssetDesktop is where macOS keeps full-size copies of Apple wallpapers you chose to download, such as Dynamic Wallpapers saved as .heic images. It holds no documents, settings or logins, so it’s safe to clear. Switch away from a downloaded wallpaper first, and keep any images you copied in yourself.
What is com.apple.mobileAssetDesktop?
It lives at ~/Library/Application Support/com.apple.mobileAssetDesktop, inside the hidden Library folder in your home folder.
Some wallpapers in System Settings > Wallpaper show a small down arrow. Apple’s wallpaper settings guide says you click one of those to download it before you can use it. An Apple Community answer from 2021 traced downloaded desktop pictures to this folder. The tech-otaku macos-desktop notes record that macOS started putting them in this writable folder during the Monterey release cycle. Back then the setting lived in System Preferences > Desktop & Screen Saver.
Inside you’ll find .heic image files. The .madesktop files you may have seen elsewhere are small XML files that point to a downloadable picture and its thumbnail. According to the same tech-otaku notes, macOS also keeps the downloaded package in /System/Library/AssetsV2/com_apple_MobileAsset_DesktopPicture, a system folder that System Integrity Protection guards. Clearing com.apple.mobileAssetDesktop doesn’t touch that copy.
You may not have this folder at all. It only appears after you download a wallpaper, and newer macOS versions seem to store wallpapers elsewhere. On a Mac running macOS Tahoe 26.3 that we checked, it wasn’t there.
Despite the “mobile asset” name, Apple’s downloadable fonts aren’t here either. They go to /System/Library/AssetsV2, according to this TypeDrawers thread, which is the same protected system area.
Is it safe to delete?
Yes. What macOS puts here is a copy of an Apple wallpaper, with no documents, app settings or logins mixed in.
Check two things first:
- Your current wallpaper. If it’s one you downloaded, switch to a built-in wallpaper or one of your own photos before you clear the folder, so macOS isn’t left pointing at a file that’s gone.
- Files you added by hand. Some wallpaper guides tell you to copy .heic files into this folder yourself. The macOS-Wallpapers archive does this for the old Mojave dynamic wallpaper. If you ever did that, those files are yours, so move them somewhere else before you clear the rest.
Why it gets so big
The folder grows only when you download a wallpaper. Apple’s wallpaper settings guide explains how to download one but not how to remove it, so old downloads can stay long after you’ve switched away.
If wallpaper storage on your Mac looks huge, check the animated aerials. Those are videos, and they live in a different folder. On Sonoma, Apple Community users found them in /Library/Application Support/com.apple.idleassetsd/Customer. On Tahoe, users report a new home at ~/Library/Application Support/com.apple.wallpaper/aerials. Clearing com.apple.mobileAssetDesktop won’t touch either one.
How to clear it yourself
- Open System Settings > Wallpaper (System Preferences > Desktop & Screen Saver on Monterey). If your current wallpaper is one you downloaded, pick a built-in one or one of your own photos.
- In Finder, choose Go > Go to Folder, paste
~/Library/Application Support/com.apple.mobileAssetDesktop, and press Return. If Finder can’t find it, you don’t have the folder and you’re done. - Look through what’s there. Apple’s wallpapers are .heic files. If you spot an image you copied in yourself, drag it to another folder first.
- Select everything inside the folder and press Command-Delete to move it to the Trash. Leave the com.apple.mobileAssetDesktop folder itself in place.
- Check that your desktop still looks right, then empty the Trash to get the space back.
Using the Trash first gives you an undo if something looks off. We explain that habit in why we move things to the Trash first. If you want a removed wallpaper back later, go to Wallpaper settings. Apple’s guide says a wallpaper with the down arrow downloads when you click it.
What SpaceUp Mac does with it
The Clean tab lists this folder under System as “Downloaded Apple wallpapers” when it has anything in it. It’s marked Review and left unticked, and if you tick it, SpaceUp Mac deletes the folder’s contents directly instead of moving them to the Trash, so switch wallpapers first. If the folder is 80 MB or larger, Deep Scan also lists it as “App / SDK data · review,” with a note to switch wallpapers first, and asks you to confirm before moving the folder to the Trash (how cleaning works).
Common questions
Will deleting com.apple.mobileAssetDesktop break macOS?
No. It holds downloaded wallpaper images, not system files. If you switched wallpapers first, the only cost is downloading one again if you want it back.
Is this where macOS keeps downloaded fonts?
No. Apple’s downloadable fonts sit in /System/Library/AssetsV2, which System Integrity Protection guards. This folder holds wallpapers.
Why don’t I have this folder?
macOS creates it when you download a wallpaper. If you’ve only used built-in wallpapers or your own photos, or you’re on a newer macOS that stores wallpapers elsewhere, it may never appear.
What else in my Library folder is safe to clear?
App caches are the usual next stop. See what’s in Library/Caches. For a full cleanup plan, start with how to free up disk space on a Mac.