Some classes of federal jobs would be exempt from the policy, and a criminal history would remain an automatic disqualifier for some positions in law enforcement and other areas. Attorney General Loretta E. Lynch highlighted the new policy at an appearance on Friday at the federal prison in Talladega, Ala.
In macOS, keychain files are stored in ~/Library/Keychains/, /Library/Keychains/, and /Network/Library/Keychains/, and the Keychain Access GUI application is located in the Utilities folder in the Applications folder. It is free, open source software released under the terms of the APSL.
i.e. my keychain has my Facebook, YouTube, email, Apple ID, Amazon password etc. It saves loads of typing and you don't need to remember them all. So long as you secure your OS X account or you computer it's safe to use. The password is your OS X Admin password.