When compiled with Xcode 6, iOS 7 is treated as if iOS6 was matched.

[williamsjj]

If you compile this code with Xcode 6 (works fine in Xcode 5):

if(SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(_iOS_7_0)) {
    /*Do iOS7 stuff*/
} else {
    /*Do iOS6 stuff*/
}

Then run it on an iOS7 device, the else block will fire incorrectly (as if the device wasn't greater than or equal to iOS 7.0).

(On iOS8 devices the >= iOS7 block fires as expected)

[carlj]

@williamsjj the will check it

[williamsjj]

Thanks Carl!