(Avast) Hello Ruthie, I understand your concern. What can I do? AVG.com uses cookies to personalize your experience and help us improve content. My Mac is OS X Lion 10.7.5, Late 2006.They can very well corrupt you Mac and is not necessary, Macs have built in protection. Do not install any AV software on your Mac. Also, I have tried downloading anti malware (Avast and AVG) but they then tell me they do not work on my version of OS (10.7.5).Install Avast Passwords Android in PC (Windows 7,8/10 or MAC)