Step 1.  Open Keychain Access.


Located under the Utilities folder within the Applications folder.



Keychain1

Step 2. From the Keychain drop-down menu, choose Preferences.



Step 3. Click General, then click Reset My Default Keychain.



Keychain2

Step 4. Enter with your account login password and then click the OK button.


Keychain3

Step 5. Quit Keychain Access.



Step 6. Restart your computer.