Download the antivirus software: Download and install your antivirus software on your Mac the same way you do any other type of program.Creating an account also will allow you to receive notifications of software updates. This will let you adjust various settings related to privacy, the devices you're protecting, your subscription, and your payment method. Consider creating an account: When you purchase antivirus software online, you will probably be asked to create an account.Although some companies offer free antivirus programs, they usually protect fewer numbers of devices, run on fewer operating systems, and identify and remove fewer online threats. All of these products are effective and reliable. To get started, check out our lists of the Best Antivirus Software for Mac of 2021 and Best Antivirus Software of 2021. Antivirus software also should be easy to use and have the features you need without breaking the bank. Look for one that detects and removes viruses, spyware, phishing emails, worms, and other threats. Choose an antivirus program: Good internet security in part requires choosing a good antivirus program.