How to block website on Safari
1- Log on to your mac from the administrative account . 2- Open System Preferences .
3- In the bottom row, under "System", select Accounts . If you already have an account that you wish to block website. If don't have, create an account that not administrator account. 4- Choose the account on the left then 5- Checkbox " Enable Parental Control " then 5- Click the "Open Parental Controls" button on the right . 6- Click "Web" tap 7- Click "Try to limit access to adult websites automatically" 8- Click "Customize" button 9- Click "+" button under "Never allow these websites" 10- Type website address want to block 11- Click "OK" 12- Close System Preferences