I am locked out of macbook pro by 4 digit passcode

I have never, never seen anything like you describe - particularly with the 'note'. It appears (and I even hesitate to say this) that you have, somehow, been hacked (and I don't know how). It seems that someone has remotely locked your Mac.

Your only remedy is going to be to take your MacBook Pro to your local Apple Store or an AASP and see if they can unlock your computer. Let us know what they have to say.

Very strange,

Clinton

I would agree - the poster's iCloud account has been hacked, and they have used Find My Mac to remotely lock the computer.

Cumbrian, if the hacker has not changed your iCloud password, you could try logging into iCloud.com and use Find My Mac to release the lock. If that doesn't work, you will need Apple's help.

I strongly recommend that you first, change the passwords for all email accounts that you use (use different, hard to guess passwords), then change your iCloud password, and also set up two-factor authentications a second layer of security - this means that nobody can access your iCloud account without having access to your cellphone.

Matt

You need to wipe your drive and simply start over again.

Since your password(s) has been compromised, I would recommend spending the $50 for 1Passowrd, available from the App Store. It will generate virtually unbreakable passwords for any and all accounts.

You were a victim this time - I would also report the theft of data to your local law enforcement agency.

Clinton

maybe someone hacked your icloud account and locked your macbook pro using find my iphone

This happened because you chose a weak password, or weak security questions.

One way to generate a secure password is the following. Triple-click anywhere the line below on this page to select it:

openssl rand -base64 10 | cut -c-14 | open -ef

Copy the selected line to the clipboard (command-C). Launch the Terminal application and paste into the window that opens (command-V). A string of 14 random characters will appear in a TextEdit window. Use that string, or a substring, as the password. To generate another random string, press the up-arrow key and then the return key with the Terminal window active. You can then quit Terminal.

As for the security questions, the answers must be impossible to guess, no matter how much someone knows about you.

Another good choice is RPG. Nice, free password generator.

I'd recommend you make use of the password generation features in OS X Mavericks when it comes out. Apple has stated the iCloud keychain feature will create practically uncrackable passwords for you, all managed by yoru iCloud keychain that is accessible to you when you log into your system. With this, anyone accessing your various online accounts directly will need to remember or guess a highly cryptic password, but you can reveal these passwords on your system with your login password: http://www.apple.com/osx/preview/#icloud-keychain

FWIW and ignoring any discussions of OS X Mavericks, there's been a password generator available in OS X for many years. The Password Assistant. It's (well hidden) in Keychain Access.

When you add a new entry, you can generate a password by clicking on the key icon to the right of the sheet.

For an existing password entry in Keychain, you can access and use the Password Assistant to select a new random password by pressing on the key icon to the right of the password box.

Other tools with these password-generation capabilites include 1Password.

Given the choice I'd use a digital certificate (possibly a certificate with a passphrase associated) and not a user-generated password, but few tools offer that.

In case you're tempted to complain to that email address, don't. If it's genuine, it almost certainly belongs to an innocent party whom the hacker wants to attack indirectly.

Joe job - Wikipedia, the free encyclopedia