Unable to open MacBook after changing Apple ID password and updating it

merhama Said:

"I cannot open my McBook: I change apple id password"

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Reset the Forgotten Mac Password:

A. Where to Reset it:

Reset it using the login screen. You'd go through your Apple ID to perform this. Find out more here: If you Forgot your Mac Login Password - Apple Support. Make sure that caps lock is not enabled when typing it.

B. Troubleshooting the Reset:

Go here, if having issues: If you can't Reset your Mac Login Password - Apple Support

C. Learn from This:

Important: Keep a handwritten, hardcopy list of your passwords. Store it in a secret location that only you are knowledgeable of, and only you have access to. And, on top of that, don't share you passwords with anyone whomsoever.

merhama Said:

"I change apple id password then I updated my Mcbook. Now it’s asking for an iphone passcode. I entered the passcode of my current iphone but no progress. Please tell me what to do."

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Getting into your Apple Account:

Get a Text or Phone call to send you a verification code.

1. Go Here: Get a Verification Code and Sign in with Two-Factor Authentication - Apple Support
2. As it Reads: "If you don’t have a trusted device handy, you can have a verification code sent to your trusted phone number as a text message or phone call."