Email ShieldĮmail Shield scans for threats in your incoming and outgoing email messages. To add exceptions for this Shield, see Configuring Antivirus Exceptions (MacOS). Scan secure connections: specify if Web Shield should scan secured or encrypted connectionsĪutomatically block pages with malicious content: choose whether Avast completely blocks web pages that may contain malicious content as detected by Web Shield Verify suspicious URLs using Avast's cloud service: choose whether Avast can check suspicious URLs against its cloud-based list of reputable websites Web Shield actively scans data that is transferred when you browse the internet to prevent malware from being downloaded and run on your Mac. Report potentially unwanted programs: choose whether Avast notifies you about Potentially Unwanted Programs when they are detectedĪutomatically move infected files to the Virus Chest: choose whether Avast automatically moves potentially infected files and threats to the Virus Chest when they are detected If malware is detected, File Shield prevents the program or file from infecting your Mac. File Shield actively scans all programs and files on your hard drive as they are opened, run, modified, and saved.