Its a bit strange…but good to know that!!! Tried it…and it worked.

I got myself into this cruise boat with out auto pilot.  After wiping my entire drive, and rebuild the RAID, I wondered “HOW could it be possibly not to install any version?”  The answer is PRAM.  You need to reset your PRAM. Your Mac stores certain settings in a special memory area even if it is turned off.  On Intel-based Macs, this is stored in memory known as NVRAM; on PowerPC-based Macs, this is stored in memory known as PRAM.

Information stored in NVRAM / PRAM includes:

• Speaker volume
• Screen resolution
• Startup disk selection
• Recent kernel panic information, if any

How to do?

1. Shut down your Mac.
2. Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
3. Turn on the computer.
4. Press and hold the Command-Option-P-R keys before the gray screen appears.
5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
6. Release the keys.

After resetting NVRAM or PRAM, you may need to reconfigure your settings for speaker volume, screen resolution, startup disk selection, and time zone information. Also OS X does not store network settings in NVRAM / PRAM.

Enjoy!!!