Also don't have an answer but I have got a completely wiped iMac late 2011 trying to install Lion (or just any OS for that matter!). Read through all the comments, tried the date/time fix in Terminal but no year between 2009 to now makes any difference, same error- “cant download additional components needed to install Mac OS". And if connecting to WIFI overrides the date/time fix then how are you supposed to install the OS? Connecting to Safari via MAC Utilities and downloading it doesn't work either because you download the dmg file but because theres no OS, theres nothing to then open the dmg file?!?! Help!