With your Mac connected and shut down, press and hold the power button until you see the startup options screen. Click Options > Continue to boot into Recovery Mode. From the Apple menu, choose Utilities > Share Disk.
If you can't change or reset your password Enter your Apple ID. Did you forget your Apple ID? Select the option to reset your password, then choose Continue. Choose to answer your security questions, get an email, or enter your Recovery Key.* Learn what to do if you don't receive your verification or reset email.
If you can't change or reset your password
Follow these steps:
Use the Reset Password assistant In the Terminal window, type resetpassword , then press Return to open the Reset Password assistant. If you're asked to select an admin user you know the password for, click “Forgot all passwords?”. At the Reset Password window, click Deactivate Mac, then click Deactivate to confirm.
Go to Settings. Tap [your name] > Password & Security > Change Password. If you're signed into iCloud and have a passcode enabled, you'll be prompted to enter the passcode for your device. Follow the onscreen steps to update your password.
macOS Two-Factor Authentication
On the login screen, tap Forgot password above Log in. Tap Username or Phone. Enter your email address, username or phone number, then tap Next.
Here you can follow the steps below to remove Apple ID so as to reset iPhone without iCloud password.
With AnyFix, you can reset your iPhone/iPad/iPod touch without a passcode or iCloud password. Please note that reset iPhone will erase all data and settings on your device you need to back up your device data in advance.
Normally, you can go to iCloud.com to factory reset your iPhone. But this method can't be used if you forget the iCloud passcode. Then is it possible to reset your iPhone without an iCloud password? The answer is an absolute YES.
Users who want to delete their iCloud account without entering the password can follow these simple steps:
Here's how to reset your Apple ID password and regain access to your account.
You need a passcode (or password on Mac) set up on your device.
Reset or recover an Apple ID. To reset a forgotten password, unlock your account or recover an Apple ID visit https://iforgot.apple.com. An Apple ID is the personal account you use to access Apple services like the App Store, iTunes Store, iCloud, iMessage, the Apple Online Store, FaceTime, and more.