As a man of my word, I am back to post my method to running Mavericks 10.9 on my Dell M6400.
All referenced materials are available as an attachment in this post.
I take no responsibility for any damages incurred while following this guide. All files included worked flawlessly on my machine but may not necessarily work for yours.
Ensure you have Execute bit enabled in the BIOS and are in AHCI mode. Note that my machine was running the most recent version of the M6400 BIOS available from DELL. Also be aware that you will need to install a secondary wireless card into the M6400 which is OSX compatible as the stock one doesn't fit the bill. The Broadcom BCM4321 Wireless N Mini PCIe is an excellent choice for native support out of the box, and eBay has plenty for less than $10.
1. Download a copy of Mavericks 10.9 from the Apple store and install to USB key using _UniBeast from Tony Mac and select the "Enable Laptop Support" option.
2. [Optional]: If you need MBR support, apply the MBR Patch as outlined here: http://www.insanelym...icks-mbr-patch/ -- For my installation, I chose to go with using a GPT partition scheme (to keep things more vanilla ) and this is realativly painless due to the M6400's dual drive bays!
After creating the installer, run this command in terminal replacing "installer volume name" by the name of your installer drive. If it contains spaces, surround the name by " or precede each space with \ (you can just drag and drop the drive to terminal when typing the command) sudo tar zxvf ~/Downloads/Mavericks_GM_MBR_Patch.tar.gz -C /Volumes/"installer volume name" If you download with Safari, it will automatically expand the gz, so the command should be sudo tar xvf ~/Downloads/Mavericks_GM_MBR_Patch.tar -C /Volumes/"installer volume name"