A few of the methods floating around the Mac community have been compiled here in one easy-to-reference place. The information here has previously been made available from many different sources online and is presented with the intention of helping people with legitimate reasons for resetting their Mac OS X password. There are ways of bypassing nearly any security measure when a hacker is literally sitting right in front of your system. Anyone with physical access to your machine (whether it is Windows, Linux, or Mac) can eventually find a way in if they know what they’re doing. Before you go thinking that Mac OS X has a severe vulnerability that makes it less secure than other operating systems, think again. Yes, it’s startling to think that anyone could theoretically walk up to your computer and gain access within minutes. This tutorial may ruffle some feathers, but it addresses a topic that a ton of people ask about all the time.

There are numerous ways to reset a password with no OS X discs. Or maybe you purchased a used Mac from someone else and they’ve got it locked down. Ignore the part about how to do it if it's a newer M1 silicon machine.Let’s say you totally forgot the password to log on to your Mac. Here's a link with some more info and options and walkthrough basically. If you don't want anything on it you can simply reinstall the operating system from the recovery options window. Then you can save pics he may have had etc. It'll ask which account you want to reset password on, select his account and make whatever password you wish and then it'll prompt you to restart, then use that password to login. Type 'resetpassword' as one word, without the quotes, and press Return. A new window will show up, waiting for you to enter a command. Then once the recovery options screen opens, With your Mac now in Recovery Mode, click on Utilities in the menu bar followed by Terminal. (Power on machine) and immediately hold down the command and R key for about 10 seconds or so.it'll boot up slow.

If it's just a simple login password then yes and you can do that without data loss. or it's a paperweight and nothing can be done unless you have original receipt and ID to match it and take it to apple. If it's an Apple ID passcode and firmware locked (file vault on) and it prompts you for that before it'll let you into recovery mode then no, you'll need that passcode or recovery key etc. (Power on machine) and immediately hold down the command and R key for about 10 seconds or so.it'll boot up slow

How to reset macbook without password