I have just purchased a new HP Printer Officejet Pro 8610. Despite numerous calls to both Apple and HP, I cannot get my Mac (Version El Capitan 10.11.3) to print! The driver has installed properly and will print a test page. It will also print using the cable. Other PCs can print from this printer. My Mac will not let me print anything wirelessly - I have tried everything! It just says 'connecting to printer' but then nothing happens. Any advice?