Once the history is deleted from your internet broswer, it's not completely erased from your hard drive. There are many programs to help you retrieve deleted history data, but such applications are generally expensive. One option is to search for the cookies that are still on your system. Another option is make sure your Time Machine application is set up to retrieve past system status before the browser history was deleted.
Click on the "Time Machine" icon on your Mac desktop. Click on the "Set Up Time Machine" button.
Click on the button in the "Off" position and change it to "On." Your system data is now backed up, and you can use Time Machine to return to the date and time before any browser history was deleted.
Click on the "Choose Backup Disc" button to choose an external drive or location where you would like to store your backup information.
Open Safari and click on the "Safari" option from the top toolbar. Click on the "Preferences" option from the drop-down menu.
Click on the "Security" option at the top of the pop-up "Preferences" box. Click the "Show Cookies" button, and you will see your deleted browsing history.