More than 13 alternatives to choose: Mac OS X 10.5.6, Mac OS X El Capitan, OS X 10.9 Mavericks and more Find the best free programs like OS X Lion for Mac.But if you want to stay secure on OS X 10.9.5 Mavericks, you need to STOP using that 3-4 year old version of the Safari Web browser and. They can conflict with Mac's own built-in security.
No Anti-Virus software or so-called 'cleaning' apps are needed or recommended for Mac OS.