Q:

Can't install SDK6 in Xcode5

I have copy the sdk6.1 from xcode4 to the folder of xcode5, as shown below

but the xcode5 doesn't give the option for sdk6 in the base sdk

Also, when i try to build the project from xcodebuild, it will say that can't locate iphoneos6.1. 
is there anyone have idea about it? 

A:

You should copy the SDK, not the simulator files.  That's why you do not see it.  This is the correct path:

Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs

Note that you should copy the iPhoneOS6.1.sdk not iPhoneSimulator6.0.sdk.  So go to xcode 4 in that path I wrote above, take the correct folder and copy it to the same path in xcode 5.