You also need to download and launch the AirPrint App on your iOS or Android devices in order to print through them. While Configuring AirPrint App on your Mac device, Turn on your HP Envy 7645 printer and install the AirPrint app, also verify if the printer is active and not on Sleep mode. Furthermore, for any assistance on AirPrint Feature on HP Envy 7645 Printer, call us at the toll-free number +1-855-602-1890 or visit us at our site