The information in this post is presented with the intention of helping people with legitimate reasons for resetting their macOS Sierra password. Password for all admin account or even a standard account can be reset when booted from the Recovery Partition on OS X. You can use the terminal command “Resetpassword” in recovery mode or by rebooting into Apple’s Setup Assistant tool. There are many ways to reset admin or root password without OS X discs / bootable media.You don’t need to worry to get the recovery disk to reset the password as it can be reset outside of the installed macOS Sierra environment. How would you use this Mac now? Do you know how to reset forgotten macOS Sierra Password without knowing the old password? There could be a number of reasons why you might want to hack into, or break into, a password-protected Mac computer without using the password.You will need to reset its admin account password. Or maybe you purchased a used Mac from someone else and they’ve got it locked down. Let’s say you totally forgot your password or an Admin account password to log on to your Mac. User accounts with Admin privileged are allowed to make system wide changes.Only admin account can create a new user, delete important files, install new program or make serious changes to macOS Sierra.

Forgot Admin account / Root (System Administrator) Password on macOS Sierra ?

Reset mac password when forgotten