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Learn how passwords are used on Mac
macOS is designed to give you a safe and secure computing environment. The security of your Mac depends a great deal on using secure passwords in key areas.
Login password
A login password, also called a user password, allows the user to log in and access the information on the Mac. Privileges are limited by the type of user. An administrator user is required to perform many important tasks, such as setting certain system preferences, installing software, and administering standard users. See Set up users, guests, and groups.
Passwords in iCloud Keychain
Keeping track of passwords is hard, especially if you never use the same password twice and have multiple devices. iCloud Keychain keeps website and Wi-Fi passwords up to date across your Mac and iOS devices. It also keeps account passwords and settings that you add to Internet Accounts preferences up to date on your Mac.
When you need to create a new password for a website, Safari suggests a unique, hard-to-guess password and saves it in your iCloud Keychain. Safari fills it in automatically the next time you need to sign in, so you don’t have to remember it or enter it on any of your devices. See Use iCloud Keychain to keep information safe.
Passwords for websites or Internet apps
If you need help with a password for a website, see the website’s help, or the account information on the website.
If you need help with a password for an app that connects to an account on the Internet or a network, see the documentation that came with the app, or online information that supports the app. For example, if you have a mail account with a service provider or website, see the documentation on the website or contact the provider. See the Apple Support article If Mail on your Mac keeps asking for your password.
Passwords in Keychain Access
Keychain Access stores passwords for various apps and services, and saves you the effort of authenticating separately for each of the items in your keychain. The keychain is secured by a keychain password, which is unlocked when a user logs in. See About your keychain password.
Apple ID
A user’s Apple ID can be used to reset the login password if the password is forgotten. Sign in to your Apple ID account page.
Recovery key
When you encrypt the information on your Mac using FileVault, you can create a recovery key. If you forget your login password, you can use the recovery key to unlock your startup disk and change the login password. The recovery key should not be stored in the same location as the Mac, where it can be discovered.