To find the WiFi password on Mac OS X, you can follow these steps:
Open the Applications folder and launch the Utilities folder.
Open the Keychain Access application.
In the search field, enter the name of the WiFi network that you want to find the password for.
Double-click on the entry for the WiFi network to open the password entry.
In the Attributes tab, check the box next to "Show password".
Enter your Mac user account password when prompted, and the password for the WiFi network will be displayed.
By following these steps, you can easily find the password for a WiFi network that you have previously connected to on your Mac. It's important to note that you will need to have administrator access on your Mac in order to view the password for a WiFi network.