Way back in 2009, Apple added a very handy feature to iMacs, allowing them to be used as a monitor for another Mac – typically a MacBook. Known as Target Display Mode, the company unfortunately dropped the feature from the model launched in late 2014 and it has never returned.If you want to do the same with later iMacs, there is an app for that, as we outlined last year. But Quinn Nelson at Snazzy Labs opted instead for the ultimate conversion … more…