Downloaded Yosemite, everything was working great until I plugged my iPhone 4 into the computers usb jack to charge it. Since then my computer simply doesn't work. EXTREMELY slow, pinwheel, etc. When I finally got the activity monitor to open these three things are red and "Not Responding" identityservicesd coreaudiod SpotifyWebHelper Safari Web Content callservicesd Tried repairing disk permissions but it gets stuck. Any Ideas on how to fix this would be greatly appreciated as the apple store has been completely useless and understaffed even though they just launched a new OS. Thank you.