Yes, a Mac can be hacked remotely. According to a report from Kaspersky Lab, over half of all attacks on Macs are remote. That means someone can access your Mac without ever having physical access. This can happen in a few ways, but the most common is through a malicious email attachment or link. When you click on something you shouldn't, it can give a hacker access to your system. Other ways include unsecured Wi-Fi networks and exploit kits. To protect yourself, it's important to keep your software up to date and to use a reputable security program.