First, go to www.mcafee.com/activate, the official McAfee activation page, to activate your McAfee product key on a Mac. If you don't already have a McAfee account, create one or log in. Enter the 25-character product key that came with your subscription after logging in, then click "Submit." After identifying your product, McAfee will walk you through the installation procedure. To start the McAfee software installation process on your Mac, download the file and open it. To finish the setup, adhere to the on-screen directions. Restarting your Mac after installation will successfully activate the McAfee product, protecting your system.
Follow these steps to download and install McAfee antivirus on Mac :
Visit mcafee.com/activate from your web browser.
Press My Account and Sign in.
Write your email address and passcode, and press Submit.
Press My Account.
Choose the exact LiveSafe product subscription, and then press Download.
You're All Set.