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https://developer.apple.com/documentation/iokit/1588648-iohiddevicegetproperty indicates that IOHidDeviceGetProperty API can be used to fetch HID device properties listed in https://developer.apple.com/documentation/iokit/iohidkeys_h_user-space/hid_device_property_keys?language=objcHowever Lync/SfB specification requires that a device also needs to furnish a property called UCQ (custom property) .In Windows OS, HidD_GetIndexedString API is used to fetch a property at a given index.What is the equivalent API in Mac to fetch a property at an index? Are there any other means to query custom properties ?Thanks much in advance!!