A macOS update went in, and now something is worse — an app won't launch, Bluetooth drops, or the whole machine feels sluggish. Downgrading (rolling macOS back to an earlier version) is a real fix, but it is destructive if you rush it. Here is the safe order we use on every Mac that passes through our Marion, Ohio shop, plus the one hard limit on newer Macs that decides which route you can even take.
Read this first: back up before you touch anything
Every downgrade method below erases your startup disk. There is no in-place "uninstall the update" button on a Mac. So before anything else, make a fresh backup: plug in an external drive and let Time Machine finish a full backup (System Settings > General > Time Machine > Back Up Now on Ventura and newer). If you skip this step, you lose whatever is not already copied somewhere else — email, photos, downloads, all of it.
The one limit that decides your route: Apple silicon can't go below what shipped
On an Apple silicon Mac (M1, M2, M3, M4), you cannot install a macOS version older than the one your Mac originally came with. If your MacBook shipped with Sonoma, Sonoma is the floor — Recovery Mode simply won't let you go lower. Intel Macs are more flexible and can generally run any macOS version they officially support.
Not sure what your Mac shipped with? A Mac released in a given year shipped with that year's macOS (or the one just before it). When in doubt, the Time Machine route is safer, because it only restores a version you actually ran before.
Route 1: Restore from a Time Machine backup (the easy, safe way)
If you have a Time Machine backup from before the update, this is the cleanest downgrade — it brings back your old macOS and your files exactly as they were.
- Connect your Time Machine drive.
- Enter Recovery Mode: on Apple silicon, hold the power button until "Loading startup options" appears, then choose Options. On Intel, hold Command-R at startup.
- Choose Restore From Time Machine.
- Pick a backup snapshot dated before the update, and let it restore.
When it finishes, you are back on the older macOS with your data intact. This is why the pre-update backup matters so much — it is the only route that keeps your files.
Route 2: Erase and reinstall an older macOS (when you have no backup)
No pre-update backup? Then you erase the disk and install an older macOS from scratch. This deletes everything on the drive, so copy anything you still need off the Mac first (to that external drive or iCloud).
- Make a bootable USB installer of the macOS version you want, on a second Mac, using the full installer from the App Store and Apple's
createinstallmediaTerminal command. You need a 16 GB or larger USB drive. - On the Mac you're downgrading, open Recovery Mode and use Disk Utility to erase the internal disk (choose APFS).
- Boot from the USB installer — hold Option on Intel, or hold the power button and pick the USB from Startup Options on Apple silicon.
- Install the older macOS, then restore your files from the copy you made.
Reminder from above: on Apple silicon this only works down to the version your Mac shipped with. Intel Macs can go back to any version they officially support.
What if you just want the update to behave?
Before you downgrade, it is worth ruling out a bad install. Sometimes the update itself is fine and one glitch is doing the damage. Reinstalling the same version from Recovery Mode (which keeps your files) fixes a surprising number of "the update broke everything" cases without the data risk of a full downgrade. If a specific app broke, check for an app update first — developers usually ship a fix within days of a major macOS release.
Frequently asked questions
Can I downgrade macOS without losing my files?
Only via Time Machine — restoring a backup made before the update brings back both the old macOS and your files. Every other route erases the disk, so you must copy your files off first and restore them afterward.
Why won't my Apple silicon Mac let me install an older macOS?
Apple silicon Macs refuse any macOS older than the version they shipped with. That is a hardware-level limit, not a setting — there is no way around it. Your only "downgrade" is to the shipping version or newer.
Is it safe to keep running an older macOS long-term?
For a while, yes, but older versions eventually stop getting security updates. If you are downgrading because a new Mac update keeps breaking things, it may be worth looking at a different machine. Our Apple clearance Macs are tested and priced to be an easy upgrade, each backed by our own warranty.
How long does a downgrade take?
A Time Machine restore usually runs 30–90 minutes depending on how much data you have. An erase-and-reinstall is faster to install (about 30–45 minutes) but you spend extra time backing up and restoring files by hand.
Downgrading and still stuck, or the Mac won't boot at all afterward? We're a real shop in Marion, Ohio — get in touch and we'll help you sort it out.