Hi, i have an iMac late 2009 and recently i installed yosemite. Clean install. I have a problem with the bluetooth keyboard. Although the option key works (i can boot with option pressed), inside the Yosemite it doesnt. I opened the keyboard viewer and when i press option key it shows the extra chars only a few are "enabled" (they show them in orange background). When i try to enter the euro symbol (option + shift + 2) it doesn't work or when i try to see the source of a website (option + cmd + U). I tried to do a NVRAM reset (option + cmd + p + r) with no luck. Is there anything else i can do?