Techtool Pro 11 is an application that helps you test and repair your Mac. You can start with 'Check Computer' to perform a complete diagnostic check of your Mac and hard drives. A single click of your mouse runs a smart check of your hard drive to detect impending drive failure, a RAM test, analysis of disk directories and more. If problems are found, advice is provided on how to proceed to repair the problem. You can use 'Check Computer' regularly as a part of your preventive maintenance program. You can customize testing using built-in Preferences.