Running a virus scan on Mac helps protect your files, passwords, and privacy from emerging threats. This guide walks you through native and third-party tools, preparation steps, and safe remediation practices.
Use the table below to compare quick scanning options you can use right away on macOS.
| Tool | Scan Type | When to Use | Requires Download |
|---|---|---|---|
| Apple Malware Scan Tool (AMTS) | Command-line deep scan | IT admins or advanced users | No (built-in) |
| Malware Removal Tool (MRT) | Automated background scans | Regular silent checks | No (built-in) |
| Avast Security | Real-time and on-demand | User-controlled scheduled scans | Yes (third-party) |
| Intego VirusBarrier | Customizable deep and quick scans | Mac-focused antivirus protection | Yes (third-party) |
Understanding macOS threats and scan types
Mac malware is increasingly common, so knowing the difference between adware, PUPs, and actual viruses helps you choose the right scan strategy. A quick scan checks common locations and active memory, while a deep scan examines every file on your startup disk.
How to run a quick virus scan on Mac
You can perform a fast check using built-in components or a lightweight third-party app to spot known threats without a full system scan.
Using Malware Removal Tool (MRT)
MRT runs automatically in the background and can be triggered manually from Terminal to remove detected malware components.
Using Avast Security for on-demand checks
Install Avast Security, then click Scan in the dashboard to perform a quick scan targeting apps and documents.
How to run a deep virus scan on Mac
When you suspect a persistent infection, a deep scan offers thorough analysis of system directories, user files, and kernel extensions. This is useful after suspicious downloads or unexpected behavior.
Using Apple Malware Scan Tool (AMTS)
Open Terminal and run sudo /usr/bin/mam to initiate a scan, then review logs in /var/db/mam for detected threats and actions taken.
Using Intego VirusBarrier for comprehensive checks
Choose a custom deep scan in Intego VirusBarrier, exclude unnecessary folders to save time, and follow the guided remediation for any flagged items.
Preparing your Mac before scanning
Good preparation reduces false positives and increases scan efficiency on both built-in and third-party tools.
- Back up critical files to an external drive or cloud storage.
- Quit non-essential apps to avoid conflicts during the scan.
- Update your operating system and security definitions to the latest versions.
- Disconnect sensitive peripherals if you want the scan to focus on software only.
- Note unusual behaviors, such as slowdowns or new pop-ups, to share with support.
Best practices for ongoing Mac security
Combine regular virus scans with smart habits to maintain a strong defense against evolving threats on macOS.
- Enable automatic updates for macOS and all installed applications.
- Use strong, unique passwords and a reputable password manager.
- Limit admin privileges to only the accounts that need them.
- Be cautious with email attachments and links from unknown sources.
- Monitor network activity and review security logs periodically.
FAQ
Reader questions
How often should I run a virus scan on my Mac?
Schedule a quick scan at least once a week and a deep scan monthly, or immediately after downloading suspicious files or experiencing odd behavior.
Can built-in macOS tools remove all threats?
MRT and AMTS handle known macOS malware effectively, but third-party tools provide broader detection against adware and potentially unwanted programs.
Will scanning slow down my Mac significantly?
A quick scan usually has minimal impact, while a deep scan may slow performance temporarily; running scans when you are less active helps reduce disruption.
What should I do if the scan finds infected files?
Quarantine or delete flagged items based on the tool’s recommendation, then restart your Mac and run another scan to confirm removal.