Avast Security for Mac is an essential security software that helps prevent viruses, spyware, and other malicious threats from infecting your Mac. This article explains how to download and install the application.

Install Avast Security

1. Click the button below to download the Avast Security setup file, and save it to a familiar location on your Mac (by default, downloaded files are saved to your Downloads folder). Download Avast Security for Mac
2. Double-click the downloaded setup file avast_security_online.dmg.
3. Double-click the Install Avast Security icon.
4. Click Allow.
5. Review the Avast Privacy Policy, then click Continue.
6. Click Continue to confirm that you have read the End User License Agreement, then click Agree to confirm that you accept the terms.
7. Click Install to proceed with default installation, or click Change install location... if you want to make changes to the default setup.
8. If prompted, use your Touch ID to grant permission for the installation, or click Use Password..., then enter the password that you use when you start your Mac and click Install Software.
9. If prompted, use your Touch ID to allow Avast Security to make changes to the System Certificate Trust Settings, or enter the password that you use when you start your Mac and click Update Settings.
10. When the System Extension Blocked notification appears, click OK.
11. Click Close ▸ Move to Bin.

Avast Security is now installed, but some components may not fully function until you restart your Mac. To complete the initial setup, follow the on-screen instructions to allow permissions for Avast Security. For detailed instructions, refer to the following article:

• Allowing all protection permissions on macOS

Still need help?

If you experience any installation issues:

1. Ensure your Mac meets the minimum system requirements: System requirements for Avast applications.
2. Uninstall Avast Security and any other antivirus software from your Mac. For instructions, refer to the following articles:
   • Uninstalling Avast Security from Mac
   • Uninstalling other antivirus software
3. Restart your Mac, then try to install Avast Security again by following the exact steps in this article.

If the issue persists, contact Avast Support.

Further recommendations

For more information about features available in Avast Security, refer to the following article:

• Avast Security for Mac - FAQs

For instructions on how to use Avast Security, refer to the following article:

• Avast Premium Security and Avast Security for Mac - Getting Started

Updated on: 18/09/2025