MacOS has built-in protection against malware. XProtect scans for malware using a database of virus signatures maintained by Apple, but is limited. Apple is not a dedicated security company, and it has not struggled much with malware in the past, leading to two major myths. Big Sur is available as a free upgrade, promising the most secure version of macOS.

The biggest threats to a macOS come from potentially unwanted programs, adware, ransomware and other code that finds its way onto a Mac because it is bundled with legitimate-looking software or because it was downloaded as something else.

Common signs of Mac malware:

  • Extremely slow performance

  • A browser homepage change

  • Pop-ups and other intrusive ads

  • Freeze-up and restarts

  • Browser redirection

Find these, or think you may have an infected system, or just wish to know more: