Mac won’t run Diagnostic

Greetings!

Here is the instruction: How to use Apple Hardware Test on your Mac - Apple Support

Seems that you have old system on your Mac (like 10.7 or 10.6). Please note, that if you're using OS X Lion v10.7 or earlier and you can't get Apple Hardware Test to start, see if you have an OS X installation disc named “Applications Install Disc 2.” Insert the disc in your internal optical drive or external Apple SuperDrive before following the steps, described in the above-mentioned article.

• Some Mac computers that shipped with OS X Lion v10.7 or later will start up from AHT over the Internet if your startup disk doesn't contain AHT, or if you hold down Option-D at startup. This requires an Internet connection over Ethernet or Wi-Fi.
• If you're using OS X Lion v10.7 or earlier and you can't get AHT to start, see if you have an OS X installation disc named “Applications Install Disc 2.” Insert the disc in your internal optical drive or external Apple SuperDrive before following the steps above. Or, if you're using a MacBook Air (Late 2010), plug the MacBook Air Software Reinstall thumb drive into your USB port instead.