I am trying to send PTP commands to a camera (DSLR) on IOS via USB. The PTP command is send, using: requestSendPTPCommand (from ImageCaptureCore) The main question is, if I can send PTP commands with IOS? More information: The same code/PTP command works fine on OSX. However, my iPad Mini (iOS 13.6, 17G68) returns the Error Message: 'The operation couldn’t be completed. (com.apple.ImageCaptureCore error -21249.)' The message translates to: ICReturnPTPNotAuthorizedToSendCommand (https://developer.apple.com/documentation/imagecapturecore/icreturnptpdeviceerrorcode/icreturnptpnotauthorizedtosendcommand?language=objc) Another post describes my problem quite well: http://www.openradar.me/FB7593726 best regards