"Please check that the device emulator is not selected as the active platform, as our compiler only creates builds for the ARM platform, which will fail to run in the iOS emulator."
does it mean that I can run CocoonJS app only on connected real device,
not on iOS simulator in Xcode?
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That's correct. The xcode from CocoonJS cloud compiler will only work on the real device.
As a way to speed things up, once you have created the archive, signed and created an adhoc distribution IPA, you can use Apples iPhone Configuration Tool to load the app onto the device much more quickly than using iTunes.
support.apple.com/downloads configuration utility