HELP PLEASE. I need to RE-install OS 10.6.8 (Snow Leopard) from the internet (no disk). I can't get into the command line via Cmd+R or Cmd+Opt+R no matter how hard I try. Something is seriously wrong with my iMac, hence the re-install. I also can't sign into the app store or my apple email from my iMac. (I can get into those places via other devices with no problem.) Anyway, can I RE-install from the internet using the terminal in Utilities, instead? If so, how?