I've update Mac from OS X Yosemite 10.10.4 to OS X El Capitan 10.11.1 recently. After OS update the iOS device/Simulator list and Scheme option that appears right next to build/run option disappeared completely. I'm using Xcode 6.4.
I've found something new feature >> button next to Utilities tab on top-right corner after update to OS X El Capitan shown in screenshot. After clicking >> button Scheme button appears but is disabled.
Is this any kind of big or feature? Any fix/workaround?



Got fix for using Xcode 6.x on OS X El Capitan.
For Scheme :
You can select scheme using
Product menu -> Scheme -> Select SchemeYou can also edit, manage or add scheme using above steps.
For Destination :
You can select destination using
Product menu -> Destination -> Select destinationfrom drop-down list.