Hi MacUsers. I'm a newbie in all senses of the word! Just got a MacBook Pro and I'm sure I don't need to tell you that you just press the power button and it sets itself up and you're off and running. 20 years of Windows PCs and now a Mac! So... What happens if there is a major crash? I'm told that there is a partition, from where I can reinstall the Mac OS. OK. But, what if there is a real hard disk failure and you have to install a new hard disk? On PCs, you can create a boot-up disk and reinstall the OS, and then the rest of your software. What do you do on a Mac??? I've looked on the App Store and when I go to the OS part, it tells me that it's 'Installed'. I would simply like to have the OS on a disk. Am I going about this all wrong?!