While it is restarting, press and hold the Command + R keys until you see the Apple logo. If you see the login screen, you will have to restart and repeat this step again until you get to Recovery Mode.You can only access the recovery mode while the laptop is booting up, which is why you need to restart it.
The easiest way to reset your admin password is to enter recovery mode. Here’s how to reset your admin password on a Mac, even if you forgot your admin password.
But if you still can’t log in, don’t contact Apple Support yet. Then, you should try using your password hint by clicking on the question mark in the password field. First, you should make sure that the Caps Lock isn’t on, because passwords are case sensitive. In essence this hides the password without encrypting it to any degree, similar to one typing by shifting keypresses to the right by one character to make the input text look garbled.So, you’re trying to use your Mac, but you can’t get past the login screen because you don’t remember your password. This means it is run through a very basic conversion that keeps the same character logic of the password and therefore makes the the password illegible without truly scrambling its sequence. On these systems, the firmware password is stored as a PRAM variable in which the password is simply obfuscated. The Firmware Password Utility is by default in the Utilities menu on the recovery partition or on the OS X install disc, and may not be available if you cannot boot to these volumes. Unfortunately in these cases for newer Mac systems shipped in 2011 or later, you have to get the system serviced to reset the password however, if you own a system from before 2011, then you can retrieve a forgotten password, provided you have admin access to the system. While this can be done using Apple's Firmware Password Utility on the recovery drive or OS X installation disc, there may be times when you do not have access to this drive either because it is missing or corrupted, and therefore cannot use the password utility. A firmware password on Mac systems locks the hardware to prevent booting to alternative modes that could bypass OS X security, but in order to access some of these modes you first have to disable the firmware password.
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