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Helpful answers
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Sep 4, 2014 10:01 AM in response to sheyluckby Klaus1,Depends on what Mac or iDevice, with what operating system, you have.
Resetting or changing a password:
For Snow Leopard or earlier: http://support.apple.com/kb/HT1274
For Lion or later: http://support.apple.com/kb/HT6022
For Mavericks users:
http://www.macworld.co.uk/how-to/mac-software/how-change-admin-password-mac-3535 328/
This is also useful:
http://www.macworld.co.uk/ipad-iphone/news/?newsid=3463233&olo=email
If it's running Mac OS X 10.6.8 or earlier, insert a Mac OS X install DVD, restart with the Option key held down, click on it, and use the Reset Password utility.
If it's running Mac OS X 10.7 or newer, restart with the Command and R keys held down, open the Terminal, and use the resetpassword command:
https://discussions.apple.com/docs/DOC-4101
If it is the Keychain password that needs resetting:
http://support.apple.com/kb/ts1544
If the computer has a firmware password set, you will need to contact Apple.
Apple’s recommendations on password security: