I read the source of appium-server
if (this.xcodeVersion.major >= 7 && !this.udid) {
// iwd currently does not work with xcode7, setting withoutDelay to false
log.info("On xcode 7.0+, instruments-without-delay does not work, " +
"skipping instruments-without-delay");
this.withoutDelay = false;
}
this is why even you install IWD but still can not use it
and here is my question
Can IWD use in real device?