I want to secure my Mac so that even me or our NSA friend would not be able to login without correct password. I thought firmware password is secured, but Apple said: If you can't remember the password you set using the Firmware Password Utility or Find My Mac, schedule a service appointment with an Apple Retail Store or Apple Authorized Service Provider. Bring your proof of purchase (original receipt or invoice) with you. It sounds like the procedure is very easy so long you have receipt, Apple service provider could open it. Is there anyway to make MacOS like iOS? If password is forgotten, even Apple won't be able to open it (not sure whether this is true or not, but it's much more secure than providing receipt). Any feedback?