Accessing other user’s files/browser cookies and logins on Mac with root access? I was wondering if the root user on a Mac (Mavericks) can freely access any other user account and use a browser like they do? This means being automatically logged in their browser with all cookies/accesses for Facebook, Emails etc without a need of entering the password. Does OS X support this?
In OS X your login credentials will be stored in Keychain by default. This can be accessed by the admin only.
For more reference you can refer this.

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