Microsoft Defender

Dwight-Englewood Computer Services is rolling out Microsoft Defender for school owned & issued Mac and Windows devices. Microsoft Defender provides your device with anti-virus and anti-malware protection.

How It Works

The Microsoft Defender app will run in the background on your device, helping to protect it from viruses and malware. As you use your computer, the Defender app will silently and transparently scan files that you access. It's configured to run when your computer starts up, and to update automatically, so you shouldn't need to do anything yourself so ensure your Mac is protected.

If you are interested in learning more about Microsoft Defender and seeing how to launch and use the app on your device, click on the appropriate link:

Getting Your Device Ready

If you are using a Windows device, you are already running Microsoft Defender, as it is included with Windows 10.

If you are using a Mac device, you'll need to make sure your Mac is up to date so that the Microsoft Defender app can install on your device. You must be running MacOS 10.15 Catalina or newer. You can check the version of MacOS you are currently running by clicking on the Apple menu in the top-left corner of your screen, then selecting About This Mac froIf you are running an older version of MacOS, you can upgrade your Mac to the latest version, MacOS 12 Monterrey.

If you need to upgrade your Mac, please follow these directions to upgrade to MacOS 12 Monterrey:

If you don't see the Software Update button within System Preferences, your Mac might be a bit older. You can follow these directions instead:

What if I get a virus?

If Microsoft Defender detects a virus, typically it will quarantine the file automatically to prevent it from running on your computer. If there is any further action required, you will get a notification from the app.

If you ever have any questions about the app, feel free to reach out to our Help Desk at or by stopping by the Taub Center.