Downgrade from IOS 26 Developer beta

README.md

Downgrade from IOS 26 Developer beta

Warning

THIS WILL ERASE YOUR DEVICE. DO NOT DO THIS UNLESS YOU ARE OKAY WITH THAT, OR HAVE A BACKUP.

1. Download iTunes (exe version).
2. Download iOS/iPadOS 18.5 from https://ipsw.me.

Note

You can only download signed version (like 18.5)

3. Open iTunes, and backup your iDevice running 26 Developer beta.
4. Open the backup folder (For macOS users, please use google; windows users: press win+r, type %appdata%\Apple Computer\MobileSync\Backup\<your UDID here>).
5. Open the Info.plist file in a text editor.
6. Press ctrl-f and type Product Version.
7. Change it to 18.5.
8. Go back to the find box and type Build Version.
9. Change that to 22F76.
10. Save that file and go back to iTunes.
11. Hold shift and click Restore.
12. Select the ipsw you downloaded earlier.
13. Click continue (This step will reset your iDevice into iOS/iPadOS 18.5
14. Wait for it to restore, itunes will then ask you if you want to restore a backup, do that

Done!

You should now be back on 18.5!

Source: Sidestore Discord