How to Downgrade macOS: Roll Back to a Previous Version
Regret a macOS update? Whether an app broke, performance dropped, or a beta turned out to be too buggy, you can roll back to an earlier version of macOS. This guide covers all three methods — Time Machine, a bootable USB installer, and macOS Recovery — for both Apple Silicon and Intel Macs.
Table of Contents
Before You Downgrade
Downgrading macOS means erasing your current system and installing an older version. There is no "undo update" button — macOS does not keep the previous OS on disk. That makes a full backup non-negotiable.
Common reasons to roll back include a critical app that isn't yet compatible, worse battery life or performance after an update, or escaping a buggy beta. If you only joined the beta program, the cleanest path is often to leave the Apple Beta Software Program and wait for the public release instead of a full downgrade.
Important Limitation
You cannot install a version of macOS that is older than the one your Mac shipped with. For example, a 2026 M5 MacBook that came with macOS Tahoe 26 cannot run macOS Sequoia 15. Always check the original shipping version before planning a downgrade.
Step 1: Back Up Your Data
Because every method here erases your startup disk, back up first.
Make a Fresh Backup
- Connect an external drive and open System Settings → General → Time Machine to run a backup, or
- Manually copy your important files (Documents, Photos library, project folders) to external storage or cloud.
Pro Tip
A Time Machine backup made on the newer macOS cannot be fully restored onto an older macOS. Use Time Machine to recover individual files after the downgrade — not to "restore the whole system" backward. For a true system rollback, use a Time Machine backup that was made while you were still on the older version (see Method 1).
Step 2: Choose a Method
There are three reliable ways to downgrade. Pick based on what you have available:
- Method 1 — Time Machine: Best if you have a backup made on the older macOS version. Fastest and restores your apps and settings too.
- Method 2 — Bootable USB installer: Best when you want a clean install of a specific older version. Requires a 16GB+ USB drive.
- Method 3 — macOS Recovery: Best when you have no USB drive. Internet Recovery can reinstall the version your Mac shipped with.
Method 1: Restore from a Time Machine Backup
This is the cleanest rollback if you have a backup from before you updated.
Boot into Recovery
Apple Silicon: Shut down, then press and hold the power button until "Loading startup options" appears. Click Options → Continue.
Intel: Restart and immediately hold Command (⌘) + R.
Restore the Backup
- In the Recovery window, select Restore From Time Machine.
- Choose your backup disk.
- Select a snapshot dated before the update (it will list the macOS version).
- Confirm and let the restore complete. Your Mac reboots into the older version with your apps and settings intact.
Method 2: Bootable USB Installer
Use this when you want a clean copy of a specific older macOS version. You'll need the installer app for that version (downloadable from Apple's support pages or the App Store) and a 16GB+ USB drive.
Create the Installer
Follow our dedicated walkthrough: Create a Bootable macOS USB Installer. In short, download the installer, then run a createinstallmedia command in Terminal.
Erase the Startup Disk
- Boot into Recovery (see Method 1).
- Open Disk Utility, select your internal volume, and click Erase (format: APFS).
- Quit Disk Utility.
Warning
Erasing is permanent. Confirm your backup is complete and verified before this step.
Install the Older Version
- Apple Silicon: Hold the power button, choose your USB installer from the startup options.
- Intel: Hold Option (⌥) at startup and select the USB installer.
- Choose Install macOS and follow the prompts.
Method 3: macOS Recovery (No USB Needed)
If you don't have a backup or USB drive, Internet Recovery can reinstall an older system — but only the version your Mac originally shipped with (or the latest compatible, depending on the key combo).
Use Shipping-Version Recovery (Intel)
On Intel Macs, restart and hold Shift + Option (⌥) + Command (⌘) + R to reinstall the macOS that came with your Mac. Then erase the disk in Disk Utility and reinstall.
Apple Silicon Macs don't offer the same shipping-version shortcut. On those models, a bootable USB installer (Method 2) is the reliable route to a specific older version your Mac supports.
For a full walkthrough of every Recovery option, see our guide on using macOS Recovery Mode.
Step 3: Restore Your Files
After the older macOS is installed and you've completed setup:
- Open Migration Assistant (Applications → Utilities) to pull user files from your backup, or
- Manually copy your documents back from the external drive.
Tip
If Migration Assistant warns that the backup is from a newer macOS, restore individual files/folders manually instead of a full migration to avoid compatibility issues.
Frequently Asked Questions
Only if your Mac shipped with Sequoia or earlier. Macs that came with Tahoe 26 (such as 2026 M5 models) cannot run Sequoia. Check the version your Mac originally shipped with before attempting a downgrade.
Yes. Every method erases the startup disk, so back up everything first and restore afterward.
Open System Settings → General → Software Update, click the (i) next to "Beta Updates," and set it to Off. You'll stay on your current build until the next public release catches up, with no erase required.
It's safe when done carefully with a verified backup. The main risks are data loss (mitigated by backing up) and being stuck if you try to install an unsupported version (mitigated by checking compatibility first).
Conclusion
Rolling back macOS is straightforward once you've backed up and picked the right method. If you have a pre-update Time Machine backup, restoring it is the fastest path. Otherwise, a bootable USB installer gives you a clean copy of any version your Mac supports. When in doubt, confirm your Mac's original shipping version first — that's the floor you can't go below.