How to stop OS X 10.11.6 (El Capitan) from using keychain

Solution 1:

You can remove all passwords stored in Keychain via menu File -> Delete Keychain "login". This will create a 'fresh' keychain; you only have to remember not to store any new passwords in it when the system asks for it.

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For Safari, open its Preferences and go to the Passwords tab. Uncheck the 'AutoFill user names and passwords' option:

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