Downgrade to Mavericks on New Pre installed Mac Mini

I currently have a Mac Mini that was pre installed with Yosemite, however I need to replace an existing Mac Mini and I have to downgrade it to Mavericks in order for it to work properly.
I have followed the guide on Mackworld UK and have made a Mavericks bootable drive using an old HD I had, then erased the Mac minis drive, but when I tell the disk utility to boot to the Mavericks drive i just get a White screen with a stop sign and the computer shuts down.
Im assuming this is because I can only do this is the device had Mavericks on it at a certain point? or am I just doing something wrong?

Red3811 wrote:
So im assuming this is the same for a mac pro? if it had mavericks on it and upgraded to yosemite, downgrade is possible without Time Machine right?
Your assumption is correct.

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dr_box wrote:
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Below are instructions to enter UNIX shell commands. The commands are safe and do nothing but produce human-readable output, but they must be entered exactly as given in order to work. If you question the safety of the procedure suggested here — which you should — search this site for other discussions in which it’s been followed without any report of ill effects. I am not asking you to trust me. If you can't satisfy yourself that these instructions are safe, don't follow them.
The commands will line-wrap or scroll in your browser, but each one is really just a single long line, all of which must be selected. You can accomplish this easily by triple-clicking anywhere in the line. The whole line will highlight, and you can then copy it.
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Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
When you launch Terminal, a text window will open with a line already in it, ending either in a dollar sign (“$”) or a percent sign (“%”). If you get the percent sign, enter “sh” and press return. You should then get a new line ending in a dollar sign.
Step 1
Triple-click anywhere in the line of text below on this page to select it:
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This issue was raised by another poster very recently (http://discussions.apple.com/thread.jspa?threadID=1497891&tstart=0). Typically Macs cannot be booted from MacOS versions which predated the release of the hardware, or subsequent firmware update perhaps, but since Leopard was not released until after the current Core 2 Duo minis, it goes without saying that at least some of these systems did in fact have Tiger installed.
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