You will need an IPSW file and iTunes or Finder to downgrade safely.
Apple must still sign the iOS version you're downgrading to.
Backing up your data before starting is crucial to running the process smoothly.
iOS updates are designed to enhance user experience, introduce new features, and resolve existing issues. However, these updates can sometimes lead to unforeseen problems. Users who have upgraded to iOS 26 have reported various issues, including faster battery drain, decreased performance, and overall system instability. Many users prefer the stability and smoothness of earlier versions, such as iOS 18.
Fortunately, it may be possible to revert to a previous version if Apple is still allowing it. This comprehensive guide provides a step-by-step walkthrough on downgrading from iOS 26 to iOS 18, helping users navigate the process easily.
Before initiating the downgrade process, verify that Apple is still signing iOS 18. Typically, Apple ceases to sign earlier versions shortly after releasing a new update. If iOS 18 is no longer being signed, it will not be possible to obtain it through official channels.
You can check ipsw.me to see if iOS 18 is still being signed for your device type. You're good to go if that's the case.
Before you start the change, make sure you have the following ready:
A Mac or a PC running Windows.
The most recent versions of Finder (for macOS Catalina and later) or iTunes (for Windows/macOS Mojave and older).
A lightning cord.
The correct iOS 18 IPSW file can be obtained from a reliable source like ipsw.me.
A full copy of all the info on your iPhone.
Please note that downgrading will erase all data from your iPhone. Back up your important files first every time.
Go to ipsw.me, pick out your iPhone model and get the signed iOS 18 version.
To make a full copy of your files, use iCloud or iTunes/Finder. You can't use this backup on iOS 18 if it was made on iOS 26, but it's still useful in case you want to go back.
Connect your iPhone to your PC.
Press and release the Volume Up button quickly, then press and release the Volume Down button.
Keep pressing the Side button until you see the screen for rescue mode.
There should be a message on your iPhone indicating that it needs to be restored.
As you click 'Restore iPhone', hold down the Option (Mac) or Shift (Windows) key.
A file manager will open.
Select the iOS 18 IPSW file that you previously downloaded.
Check the restart. Now, you can use iTunes or Finder to put iOS 18 on your device.
After the process is done, your iPhone will turn back on.
You can set it up first, or if you have an older backup from before iOS 18, you can recover it now.
Also read: From iOS 18 to iOS 26: Apple’s Surprising Naming Strategy
iOS 26 backups will not be compatible with iOS 18. You'll need to start over or find an old file that works.
If apps are only updated for later versions of iOS, they may not function properly.
If you want to drop from iOS 18, you will have to use jailbreaks, which are dangerous and not advised.
Downgrading from iOS 26 to iOS 18 may seem challenging, but it’s achievable with the right tools and steps. Before you begin, ensure that you back up your information and verify Apple’s signing status. This process allows you to regain control over your iPhone experience, whether your decision is based on speed, battery life, or personal preference.
There’s no need to feel guilty about reverting to iOS 26 if the newer version isn’t working for you. Sometimes, security and ease of use take precedence over having the latest features.