In the latest Mac systems it also is quite secure and cannot be easily circumvented by changing hardware configurations like RAM, so this will provide a good lock for the system's hardware. How to Lock and Unlock Windows System on Laptop. Even though lock and unlock Windows system seems to be troublesome, many computer users still take it to protect their laptop or PC. It seems to be not so important topic, but still important for most users. So now let's talk about locking and unlocking Windows system on laptop. Part 1: How to Lock Windows System on Laptop. Guide: Unlock MacBook Air Firmware-lock and PIN-lock (A1466） by Bellin. A MacBook Air is locked by pin code and firmware, the model is A1466, the motherboard model is 820-00165-A, which is release in 2015. Press the MacBook power button, after entering the system, it shows PIN code lock, press the 'Option' button, it shows firmware lock. How to unlock MAC EFI Icloud with 6 digit PIN Lock passcode. Macbook Pro - iMac 1) Add or remove a stick of ram. Obviously if you have one stick in, add one and if you have two in remove one. The system will restart with the 'bong noise', allow it to do this 3 times. On the third 'bong' you can let go of the keys. The machine will now boot.
- How To Bypass System Lock Pin Code For Mac
- System Lock Pin Code Macbook Air
- Remove System Lock Pin Code Mac
Circle with a line through it
Learn what to do if your Mac starts up to a circle with a line through it (prohibitory symbol).
Question mark
Learn what to do if your Mac starts up to a question mark.
Blank (empty) screen
Learn what to do if your Mac starts up to a blank screen.
Apple logo
Learn what to do if your Mac starts up to an Apple logo or progress bar.
Globe with alert symbol
A globe with an exclamation point means that your Mac tried to start up from macOS Recovery over the Internet, but couldn't. Learn what to do if your Mac can't start up from macOS Recovery.
Lock icon
If your Mac is using a firmware password, the lock icon appears when you try to start up from another disk or volume, such as an external drive or macOS Recovery. Enter the firmware password to continue.
System lock PIN code
Your Mac asks for a PIN code when it has been remotely locked using Find My. Enter the four-digit or six-digit passcode to continue.
Login window
At the login window, enter your user account password to log in to your Mac. If FileVault is turned on, this also unlocks your disk. You might see a default desktop picture in the background, which might change to your chosen desktop picture when you select your account.
How To Bypass System Lock Pin Code For Mac
Thunderbolt, USB, or FireWire symbol
A large Thunderbolt , USB , or FireWire symbol against a dark background means that your Mac is in target disk mode.
System Lock Pin Code Macbook Air
Learn more
Remove System Lock Pin Code Mac
- Learn what to do if your Mac displays a message that it restarted because of a problem.
- Learn what do do if your Mac continuously restarts.
- When starting up from Windows using Boot Camp, your Mac doesn't show an Apple logo or the other macOS screens in this article.