Safari: How do I clear cookies on a Mac?

Step 1: Open Safari.

Step 2: Click Safari on the top menu and select Preferences from the drop-down menu.

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Step 3:  A dialog box will appear. Click Privacy, located at the top of the dialog box. Deleting cookies can result in faster computer performance and increased browsing security. 

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Step 4: Click Manage Website Data...

Step 5: A dialog box will appear with a list of cookies. Click the Remove All button or select cookies individually if you do not want to delete all of your cookies.                           

Step 6: When the Are you sure ...? confirmation message appears, click Remove Now

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Step 7: Click Done.