• Click the Apple icon in the upper left corner of your screen and select System Settings.

• In the left pane in the System Settings window, click Network.

• Select Firewall.

• Enable Firewall by clicking the toggle button and inputting your computer username and password.

1. Click the Apple icon in the upper left corner of your screen.

2. Click About This Mac

3. Click Software Updates.

4. If you see the text “Other updates are available”, click More Info.

5. Install all required operating system updates.

6. Restart your computer.

7. Repeat these instructions until there are no additional operating system updates.

1. Click the Apple icon in the upper left corner of your screen.

2. Select System Settings.

3. If updates are available, you’ll see text reading Software Update Available at the top of the left pane. Click on it.

4. In the Updates Available section, click the button labeled Update Now.

5. Agree to licensing terms and conditions.

6. Wait while the updated OS downloads to your computer.

7. Your computer will restart automatically.

Clark University provides Sophos antivirus free of charge to all members of the Clark community. If you have a paid-for antivirus software on your computer, you must fully update it.

1. Open a browser (such as Edge, Chrome or Firefox)

2. Navigate to https://www.clarku.edu/offices/its/a-z-service-catalog/antivirus/

3. Follow the detailed instructions on this page which includes the following steps:

   1. Receive a unique registration link

   2. Create a Sophos Home Account

   3. Download and Install Sophos

      1. Click here for step-by-step instructions for Mac OS installation