Mac says password is wrong but it's right. I have to enter it twice to start Mac every time. How could I solve it?

Solution 1:

If you are talking about the user password and you are locked out of your mac, you can try the following:

1. Reboot into the Recovery Drive by choosing the ‘Apple‘ menu > Restart, hold down the ‘command’ + ‘r’ keys on the keyboard during the start up process, when you see the start up screen you can let go. When the machine boots eventually you will see the macOS or OS X Utilities screen.
2. Go to the Utilites menu and select Terminal
3. At the prompt type ‘resetpassword’ (hit enter)
4. Reset your password

Keep in mind that this deletes your keychain, so your saved passwords are lost

Solution 2:

I have the same issue. I found out when I watch what's happening carefully, as I type my password the first time the Mac resets and clears the text area (shortens the line of asterisks) and I have to enter it again - making sure it's not a partial entry. Seems something is still waking up in the background. Type slowly and observe if the line of '***' becomes suddenly shorter. Frustrating.

Other causes have to do with unlocking FileVault if you have that set up. Found on discussions.apple.com.