Hi, I am at a loss as to why my late 2012 seven month old Mac Mini running Yosemite cannot be used on FaceTime. When trying to download all I get is a notice telling me that the download cannot take place because my OS x is too new. OK so the OS is new but why is it that Apple cannot (or will not!!!) update FaceTime. This is my first Apple Mac Computer and I thought that these sort of problems would not exist and that these things only happen to the "other systems" but apparently not. Keith in Derby England.