Locked MacBook Pro

ChubbyCheckers123 wrote:

I changed the password for my MacBook Pro and now it won’t accept the 4 digit code to unlock it. HELP! This is my first Mac (former PC user) AND I’m nearly 70, so I need all the help I can get. Thanks

Your local Computer user/admin account password

https://support.apple.com/en-us/HT202860

If you forgot your Mac login password - Apple Support

Firmware password is different

https://support.apple.com/en-us/HT204455

Set a firmware password on your Mac - Apple Support

https://osxdaily.com/2015/01/28/forgot-mac-firmware-password-what-now/

Forgot a Mac Firmware Password? Don't Panic, Here's What ...

ChubbyCheckers123 wrote:

It’s not a “Firmware” password.. just the 4 digit security code

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.

Activation Lock for Mac - Apple Support

if no resolve you can always call Customer Support  (800) MY–APPLE (800–692–7753)