Need to update my OS system
Hi, I'm trying to install malwarebytes on my iMAC computer and required to have at least MACOS EI Captain (10.11). When I tried to download MACOS EI Captain (10.11), I get a message that I need to have at least OS X version 10.11. How do I buy this version. Below is the type of iMac computer I have.
iMac (24-inch, Early 2009)
Thanks,
Lisa Bundrage