No matter which method you use to reset administrator password on mac, it won't automatically update the password protecting the account's login keychain. Since the keychain is still protected with the old administrator password, there would be no way to get back into it unless you could update keychain password or create new keychain.

Probably you are just prompted to do that at startup after Mac admin password reset, such as on Yosemite, or constantly asked to enter the keychain password after Mac login. Regardless of which happens, resetting keychain password would help you access Keychain again.

Method 1: Reset Keychain login password in Keychain Access

After you log into Mac with new administrator password, follow the steps below.

Manage passwords using keychains on Mac. MacOS uses keychains to help you keep track of and protect the passwords, account numbers, and other confidential information you use every day on your Mac computers and iOS and iPadOS devices. You can use the Keychain Access app on your Mac to view and manage your keychains. Review our team pricing and sign up for a Free Trial to get access to password manager, digital vault, password generator, digital wallet, and more. Now, you will see the password in the box beside Show Password. For more password related tutorials, take a look at: How to choose a good password and How to recover a forgotton Mac password. Open Keychain Access from Finder Applications Utilities, and choose Keychain Access. Best password manager to use for 2020: 1Password, LastPass and more compared. Ditch the sticky notes and get peace of mind. One of our favorite password managers can be your first defense against.

1. Open Keychain Access from Finder> Applications Utilities, and choose Keychain AccessPreferences from top menu.

2. In newer versions of Mac OS X, such as on Yosemite, you will see a button Reset My Default Keychain under the General pane.

3. Click it and enter the new login password in Password field to create new keychain.

Note: If you have no such button, choose EditKeychain List (Command + Option + L), select the login keychain, and click the minus button to delete it.

4. Quit Keychain Access and restart Mac. A new login keychain will recollecting and storing the passwords for Wi-Fi networks, email accounts, Web sites, and other logins as they occur.

Method 2: Reset Keychain password with command line in single user mode

If you cannot work with Keychain Access because of something like Messages Agent constantly asking for the forgotten login keychain password, you can use command line to reset Keychain password in single user mode.

1. Restart Mac and hold on Command + S to enter single user mode.

2. After you are prompted to enter a command-line after numerous lines of status messages, type this command to mount the root Mac OS X drive as writable.

mount -uw /

3. Delete that account's login keychain.

rm /Users/shortname/Library/Keychains/login.keychain

Note: If you are not sure the shortname, please confirm it with command 'ls /Users' at first.

4. Reboot Mac by command 'reboot'.

Find Mac Password

After Mac starts, you should have created a new keychain on Mac.

Update keychain password if you still remember the old one:

1. Click Update Keychain Password and enter the old password at startup, or continue login and enter old password when you are asked.

2. Open Keychain Access and right click on login, and choose the option Change Password for Keychain 'Login' from pop-up menu.

3. Enter the old password in 'Current Password' field and new password in 'New Password' box. Verify it and click OK to successfully change keychain password.

Related Articles:

Use your Secret Key to sign in to your 1Password account on a new device or web browser.

Help

Do I have a Secret Key?

You have a Secret Key if you have a 1Password membership, or if you belong to a family or team account.

If you purchased a standalone license for 1Password, then you don’t have a Secret Key, and you don’t need to sign in when you open the app.

Locate your Secret Key or Setup Code:

Find your Secret Key on 1Password.com

You can find your Secret Key and Setup Code in your 1Password account on the web. Use a browser you’ve used to sign in to your account before, like the browser you used to create your account.

Sign in to your 1Password account.
Click your name in the top right and choose Get the Apps to see your Setup Code.

To view your Secret Key, click “Can’t scan your Setup Code? Sign in manually.”

Important

Password Manager For Mac

You won’t be able to find your Secret Key in Safari unless you sign in to your 1Password account at least once every 7 days. To make sure you can always access your account, set up the 1Password apps and download your Emergency Kit.

Find your Secret Key in the 1Password apps

You can find your Secret Key and Setup Code in the 1Password app on any device where you’re already signed in to your account.

Mac

Open and unlock 1Password.
Choose 1Password > Preferences.
Click the Accounts icon, then select your account.
Click your Secret Key to copy it. Or click “Set up other devices” to see your Setup Code.

Windows

Open and unlock 1Password.
Choose Accounts and select your account.
Select your Secret Key > Copy to copy it. Or select “Set up other devices” to see your Setup Code.

iOS

Open and unlock 1Password.
Tap Settings > 1Password Accounts.
Tap your account, then tap your Secret Key and choose Copy. Or tap Set Up Other Devices to see your Setup Code.

Android

Open and unlock 1Password.
Tap Settings > “1Password accounts”.
Tap your account, then tap your Secret Key and choose Copy. Or tap “Set up other devices” to see your Setup Code.

Find your Secret Key in your Emergency Kit

You can find your Secret Key and Setup Code in your Emergency Kit, which you downloaded if you created your account on 1Password.com.

One Key Password For Mac Password

If you don’t remember saving your Emergency Kit, look in your Downloads folder for a PDF file named “1Password Emergency Kit”.

Change Password Mac

Get more help

Your Secret Key is your secret. It protects your account together with your Master Password, which only you know. We don’t have a copy of your Secret Key or any way to recover or reset it for you. To find your Secret Key, you’ll need one of the following:

the 1Password app on any device where you’re already signed in to your account
a browser you’ve used to sign in to your account before
your Emergency Kit

One Password Download Mac

If you don’t have one of those, but you belong to a family or team account, ask a family organizer or team administrator to recover your account.

If you’ve lost access to a device, learn how to regenerate your Secret Key.

If you still can’t find your Secret Key, contact 1Password Support.