How do I format/erase my Mac?

[mdnmep]

I'm a newborn in the MacWorld, I just want to know how can I bring my beautiful Retina MacBookPro as it came out from the box. I've sneaked thru some articles but it says about inserting the factory disc (iOS Lion Operating System), thing my Mac didn't came with.

Which are the steps I should take then? Do I need to download the iOS from somewhere? I don't know you're the PROS!

Thanks.

 

[johnnnw]

1. Restart the computer while holding down the COMMAND and R keys until the Mac OS X Utilities window appears.
2. Select Disk Utility from the Mac OS X Utilities window and click on the Continue button.
3. After DU loads select your startup volume (usually Macintosh HD) from the left side list. Click on the Erase tab in the DU main window.
4. Set the format type to Mac OS Extended (Journaled.) Optionally, click on the Security button and set the Zero Data option to one-pass.
5. Click on the Erase button and wait until the process has completed.
6. Quit DU and return to the Mac OS X Utilities window.
7. Select Reinstall Lion/Mountain Lion and click on the Install button.
8. Upon completion shutdown the computer.

There's many many threads on how to do this if you need more help:

Here's one of them:

https://forums.macrumors.com/threads/1545019/

 

[Asuriyan]

Mac tip #1: Mac OS X and iOS are not the same thing

...yet...