On macOS, a Keychain is a secure storage system, specifically the "Keychain Access" app, that stores passwords, certificates, and other sensitive information, helping you manage and remember fewer passwords across different applications and services. If you are experiencing issues logging into applications, deleting the Keychain may solve the issue.

 

Watch the Instructional Video or follow the instructions below to delete a password in Keychain:

1. To open Keychain Access on your Mac, in Spotlight from the top-right corner of the screen (magnifying glass icon), type and search "Keychain Access," then press Return. (On older macOS versions, select Finder > Applications > Utilities > Keychain Access.) 

 

2. Select "Open Keychain Access." Enter your Mac password when prompted.

 

3. From Keychain Access, you can select different Keychains to view, such as login, iCloud, System, or System Roots.  You will likely need to select “login”. Once you have selected “login”, you will see the list of Keychains.  Highlight the desired Keychain and right-click or press “Delete” to delete the Keychain.

More information on Keychains can be found on the Apple Keychain Access User Guide Page. From this Apple support page, you can also select your macOS version to view version-specific instructions for deleting Keychains.