The operation would take some time to complete.

if FileVault is not enabled, ignore this step

if FileVault is enabled, you can Turn FileVault off.

in Mountain Lion, go to Settings->Security & Privacy and FileVault tab.

Perform those steps using an Admin account. Here is what you have to do to remove the Master Password or FileVault password: Make sure you follow Step one before Step two !! Important Caution: Before you do that you must disable FileVault (if it is enabled) as you will see below.If you do not disable FileVault, you will lose access to your Home Folder since there is no private key to open it. The Master Password is basically similar to a super user password. You can use it to reset the password and gain access to your home folder even if it is protected with encryption.”This provides protection for users who forget their login password”. Note that the Master Password is used as a “safety net” in case you cannot access the computer and you need to reset the password of any user. there is a small button next to remove account button from where you can set or change a Master password. However, in Mountain Lion, you can access the Master Password screen from Users & Groups preference pane. In Leopard, it used to be accessed through the FileVault preference pane.

The place of accessing that password has changed from Leopard to Mountain Lion (I don’t know about Lion!). I don't know why I refused to use it at first now since the process from the word go is heavily involved before it can be used.So, you have just got a used Mac and discovered that there is a Master Password (in Mountain Lion), or what is refered to as FileVault, or you have forgotten your Master Password and you want to reset it or remove it completely. After all that I now have Keychain setup on both my iPhone 4s running 7.1.1 and late 2011 Macbook Pro running 10.9.3 Mavericks set up for Keychain. You can also view the saved passwords and delete any or all at your leisure.

Once set up and you have autofill enabled in Safari any of the above data will be uploaded to iCloud with your concent. Also during setup you are required to set a security code and phone number if you have one so you can receive a message when approving new devices for Keychain. Alternatively you can simply not use it grin. For the paranoid let me assure you that the information presented during setup assures that all data is encrypted and cannot be read by Apple. This allows you to securely upload your confidential data such as passwords and credit cards to the cloud. I want to tell you about this seemingly useful feature of iCloud called Keychain.

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