I have a Windows 7 and Maverick Mac Book Pro, In the middle of scanning using the wireless features of HP 7520 all in one printer, it disconnects from network. It scans once and then it generated an error message. I have attached a print screen of the error message when I use the diagnostic. I have uninstalled and installed the software and rebooted the both printer and computer. The printer works once after I have re installed the hp software. I have updated it. The photos print out well once after I reboot. Then it has too much green and the photos look terrible. I have replaced the ink cartridges. This is the most unreliable all in one printer that I have ever owned.