Billions of computers are linked through the Internet. And with so many devices communicating and exchanging information, each one needs to have a unique identifier so that the right information ...

Every network adapter has what is called a Media Access Control address that uniquely identifies it. Think of it as an ID. Having to manually go to every computer on the network, and taking the time ...

If a miscreant has purloined your Mac, you can use iCloud's Find My Mac feature to locate and, hopefully, retrieve your laptop. Watch our video to find out how. Nik Rawlinson Nik Rawlinson has been ...