Automatically filling in passwords
If you have too many user names and passwords to remember, Safari can assist you when logging in to a website.
To have Safari assist you:
Choose Action menu > Preferences and click AutoFill. (The Action menu is near the upper-right corner of the Safari window, and looks like a gear.)
Select “User names and passwords.”
Go to the website and enter your user name and password. When asked if you to want to save the information, click Yes.
You can be selective about which user names and passwords you save. When asked if you want to save a user name and password, click Never or Not Now if you’d rather not save it.
Keeping password-protected websites secret