There was no early 2012 model, only 2011 models still being sold in 2012.This is a early 2012 model.. came with osX Lion. But no physical bootable media was provided. I have original Mountain Lion dmg with me . Can you guide me farther ??
If you have internet access and can download 4.x GB easily, you can use the Internet Recovery option.I do have 8gb flash drive and a Mountain lion DMG but I dont have acess to any other mac system .... what to do then ??