Hello everyone, what if something bad happened to my mac just say i went to it one day and it wouldn't turn on or just wouldn't fire up. i bought this iMac a few weeks back its a late 2013 version. its my first ever mac what would i do if i needed to reinstall the O/S. unlike a pc i never got a disc to reinstall software if something goes wrong. on my mac don't even have a drive for a disc. Cheers Steve.