If you have used the keychain utility to save your backup code on your MacBook, you can try this method. Restore iTunes Password with Keychain Utility Just try them one by one and it is very likely that you can unlock the iTunes backup with the correct password.

You can try to input all password you frequently used. The best way to restore an encrypted iTunes backup is to enter the password you have set up. Here I put up several possible solutions to bypass the 'Enter password to unlock iPhone backup' message, which I hope will help you. I understand that you probably have already forgotten the iTunes backup password since it is barely used. If a wrong password is entered, you'll get an error message that says 'iTunes could not restore the iPhone because the password was incorrect'. Therefore you must enter the password you set up when you created the backup. In fact, neither will they work because iTunes password is the one you set up when creating an encrypted backup in iTunes. When asked to input a password of the iPhone backup, most user's first response is to enter their four digits or six digits screen lock passcode or even their Apple account code. The problem is you don't remember having set up a password for the iTunes backup in the first place. However, when trying to restoring an iTunes backup, you may be prompted to ' enter password to unlock iPhone backup' on iTunes. You can back up iPhone to iTunes in case of losing data.

Password to unlock iphone backup forgot