I want to install a more up to date os for my Mac and it will not let me
I had a problem with my Mac. When I reinstalled it put OS Yosemite on. I have tried to update this os as my virus softwares etc. Will not support Yosemite. I have tried to update from App Store but it just tells me I have all updates. Can someone advise how to get a newer os for my Mac?
iMac 21.5″, OS X 10.10