Something I am really struggling to understand, is why I see all these Yosemite bugs affecting "Macs" in soo many differing circumstances. I mean some users report WiFi issues, some Time Capsule, some graphics..etc, some no bugs at all, Why are some users experiencing these problems when others arent? Yosemite is written speifically for the Mac unlike windows written for so many brand names and clones. Some users doing fresh installs versus updates, there seems to be no pattern? I myself have a late 2012 27" iMac with Wifi issues..... nothing else. I have tried the fixes that work (sometimes) for other users but have no luck?? Can anyone shed any light?