To delete your browsing history in Safari
a. Launch Safari. Click the icon on the right that looks like a little gear and select “History” or hit the keyboard shortcut of “Ctrl” and “H.” You can also select the history option in your browser’s drop-down menu.
b. Select “Clear History.” A pop-up will ask you to confirm your action. To confirm this, select “Clear.”
c. Click “Edit” and select “Empty Cache,” or press the three-key shortcut of Ctrl,” “Alt and “E.”
d. Select “Edit” and choose “Preferences.” Select the “General” Tab. You will see an option to change how long your history is stored. Choose your new option.