Is it safe to delete iOS backups on your Mac?

Every time your iPhone or iPad backs up to your Mac, that backup lands in one folder: ~/Library/Application Support/MobileSync/Backup/. Each one can run to tens of gigabytes, and they pile up: old phones, stale restore points, devices you sold years ago. Because macOS files them under System Data, most people never see them. So: is it safe to delete iOS backups on your Mac? Usually yes, with a few caveats worth knowing first.

Where iOS backups live on your Mac

Local device backups all sit in one place:

~/Library/Application Support/MobileSync/Backup/

Inside, each backup is its own subfolder, but the folder names are long, random-looking hash strings, with no device name or date attached. There's one per backup, and they accumulate over time as you get new devices or run new backups.

A single backup can be tens of GB, so a few of them is often one of the biggest forgotten chunks of space on the whole drive. And because these count toward that catch-all "System Data" category, they're a common reason your storage looks full with nothing obvious to blame.

Is it safe to delete iOS backups on your Mac?

For old or obsolete backups, yes. The ones that are safe to remove:

• Backups for devices you no longer own: an old iPhone you sold or traded in has no reason to keep a restore point on your Mac.
• Older backups of a device you still use, as long as you also back up that device to iCloud or have a newer local backup. You only need the latest one.

A few caveats matter here, though, because this is one deletion you can't undo through normal means:

• Deletion is permanent. There's no separate recovery step beyond emptying the Trash; once a backup is gone, it's gone.
• Keep your most recent backup for any device you still use. That's your rollback point if the device is ever wiped, lost, or replaced.
• Make sure iCloud Backup is on, or you have another copy, before deleting your only backup. If the local backup is your sole copy, don't delete it without a replacement in place.

If you're weighing this against other quick wins, old device backups sit near the top of the list of what's safe to delete on a Mac: high payoff, low risk, once you keep the one that matters.

The safe way to delete a backup

Don't trash the raw folder. Because the subfolders are unlabeled hashes, it's hard to tell which backup belongs to which device, and easy to delete the wrong one. Use Finder's built-in manager instead; it labels everything by device and date.

1. Connect an iPhone or iPad to your Mac so it appears under Locations in the Finder sidebar.
2. Open Finder and click the device in the sidebar.
3. In the General tab, click Manage Backups…
4. You'll see a list of every backup, each labeled with its device name and date. Select the one you want to remove.
5. Click Delete Backup and confirm.

The list shows all your backups, not just the connected device's, so you can clear out old ones for devices you no longer have from here too.

On older macOS (Mojave and earlier), there's no Finder device view; backups were managed through iTunes: iTunes → Preferences → Devices, then select a backup and click Delete Backup.

Will deleting a backup affect your iPhone?

No. The backup is a separate copy stored on your Mac. Deleting it doesn't remove photos, messages, apps, or settings from the iPhone or iPad itself; the device carries its own data.

What you give up is the restore point. If that device is later erased, replaced, or needs recovery, you can only roll it back to a snapshot you still have, whether that's a newer local backup or an iCloud backup. That's exactly why the rule is "delete the old ones, keep the latest."

How much space you'll actually get back

It depends entirely on how many devices you've backed up and how full each was, but since a single backup can reach tens of GB, clearing a couple of obsolete ones is often the fastest way to reclaim real space without touching a single document or photo. It's frequently the single biggest quick win when you're trying to free up space on a Mac.

One last rule: don't reach inside a backup folder to hand-pick files. Treat each backup as one opaque unit: delete the whole thing through Manage Backups, or leave it alone.

Finding these by hand means digging into a hidden Library folder full of unlabeled hash names, where trashing the wrong one is permanent. Plumby surfaces big forgotten space like old device backups right in your menu bar, with the exact path and size for each, so you see precisely what you're removing before you remove it. Anything it clears can go to the Trash rather than be deleted, and it never touches your documents, photos, or projects.