Currently Being ModeratedDec 12, 2012 11:58 AM (in response to ataulm)
Welcome to the Apple Support Communities
The EFI volume is hidden, so probably you deleted it. As you have a new Macintosh, you can use Internet Recovery, so you don't have to start into Recovery HD because it will be created again when you install Mac OS X.
1. Press Command, Option and R keys while your computer is starting and open Disk Utility.
2. Select the hard disk in the sidebar and go to Partition tab.
3. If there's a partition, delete it and press + button to create a volume with Mac OS Extended (Journaled). Then, press Options and choose GUID Partition Table. Finally, select Apply.
4. Install OS X
Currently Being ModeratedDec 12, 2012 1:23 PM (in response to mende1)
Thanks for your response.
I'm attempting to remove the Recovery HD partition, via the Internet Recovery, but it says that the "selected partition won't be changed". There's no option to cancel, and the "Preparing to remove partition" indicator is active.
Would you suggest powering down, and booting via a Linux usb, using the disk management options there to fully wipe the 500gb HDD, then try Internet Recovery again, or will a wipe this way also delete the mechanism which allows the Internet Recovery?
Currently Being ModeratedDec 12, 2012 1:27 PM (in response to ataulm)
Internet Recovery is in the firmware, so it won't be deleted. Use the Linux DVD and delete Recovery HD. As you have more space in the hard disk, I think that the other free space is under Recovery HD, so you can't recover it unless you erase Recovery. Remember to convert that into free space, so you can modify the hard disk in Internet Recovery