How to Delete a Username on a Facebook Login on a Mac

By Bennett Gavrish

All Apple computers running the Mac OS X operating system come with the Safari web browser installed on them. When you log in to a Facebook account on your Mac, Safari stores a record of your username in a special data file known as a cookie. If you do not want your Mac to remember your username when you visit the Facebook website, you can manually delete the Facebook cookies in Safari.

Things You'll Need

  • Mac running OS X 10.5 or later

Step 1

Click on the "Safari" icon in the dock to launch the web browser.

Step 2

Open the "Safari" menu at the top of the screen and choose "Preferences."

Step 3

Go to the "Security" tab at the top of the pop-up window.

Step 4

Click on the button labeled "Show Cookies." A new window will open with a list of all the cookie files stored in your web browser.

Step 5

Type "facebook" into the search field at the top of the window to view only the cookies related to the Facebook website.

Step 6

Highlight all of the cookies with "" listed in the "Website" field. You can highlight multiple cookies by holding down the "shift" key and clicking on each one.

Step 7

Press the "Remove" button to delete the highlighted cookies.

Step 8

Press "Done" to return to the "Preferences" window. Now when you visit the Facebook website, your Mac will no longer remember your username.