So - I have recently updated my MacBook and all the sudden I started having printer issues - really weird - have had an HP 6600 and been printing fine for months - all the sudden starts giving error message that "something wrong detected with printer or ink cartridges - restart printer and if problem persists contact HP" so problem persisted - couldn't get help, so ordered a new printer HP OfficeJet Pro 8600 - arrived today - after one sheet same error message. I am beyond frustrated and concerned - I did everything that manual told me to as far as installation - new cartridges and everything - I really think there is something going on with these printers and my MacBook - anyone know anything about this?