Immediately hold down the Command and R keys at the same time until you see the loading bar appear under the Apple logo. This should be the easiest approach to restore access to your Mac account. Mac's Recovery Mode gives users the ability to not only reinstall MacOS, but also to reset forgotten admin password. Method 2: Reset Forgotten MacOS Mojave Password in Recovery Mode

Once you're logged in to the new account, you can reset forgotten Mac password of your original account through System Preferences.

Just go ahead and it will let you create a new Administrator account. Don't worry, all of your pre-existing data is still available.

Your Mac will restart and you need to go through the entire setup process as if it was a brand new Mac.

When it stops, enter the following commands one by one. Your Mac will display the scrolling white text during bootup. When you hear the startup chime, hold down the Command and S keys simultaneously to enter into single-user mode. This allows forgetful users to create a new admin account when they're locked out of Mac due to forgetting password. Single-user mode under Mac OS X gives you all root privileges without root password. Method 1: Reset Forgotten MacOS Mojave Password in Single-User Mode No need to use Mac installer disc or third-party software. Just boot your Mac into single-user mode or recovery mode, you can either create a new admin account or reset lost password of any existing account. Mac doesn't make password recovery as difficult as Windows does. Forgot your Mac's login password? How do I reset lost admin password without Mac OS X installer disc? If you can't sign in to another Admin account, here are several approaches you can take for resetting your forgotten MacOS Mojave password, without reinstalling.

I forgot my password on my macbook air