: Ensures only software from the App Store or identified developers can run, preventing unauthorized apps from opening.

: Automatically removes known malware if it somehow bypasses other defenses.

For most users in 2026, the short answer is , you do not strictly need to buy a third-party antivirus for your Mac. Apple’s built-in defenses have evolved significantly, making macOS one of the most secure consumer operating systems. However, if you are a high-risk user —someone who frequently downloads files from untrusted sources, handles sensitive business data, or shares files with Windows users—an extra layer of protection is highly recommended. The Case Against Buying: Apple's Built-in Defenses

: System Integrity Protection (SIP) locks down critical system files so malware cannot modify the core OS, while sandboxing isolates apps to prevent them from accessing unauthorized data. The Case For Buying: When Built-in Isn't Enough

: A built-in antivirus that scans every download for known malware signatures and runs regular background checks.