Apple.com-shield-guard.live is a very dangerous pop-up that now attacks a lot of Mac computers. The main goal of these pop-ups is to scare Mac users into believing that their computers are infected by serious malware and then to convince them to download one of the examples of rogue security programs. Apple.com-shield-guard.live pop-ups claim to be related to Apple, however, they are simiply the product of online frauds who hunt for your money. We recommend you to inspect your system in order to eliminate the adware that causes these alerts.