Wow just stumbled across this forum.. wish i found it earlier may have saved me a lot of work.
I have managed to get OSX 10.8.3 Retail up and running natively on my e6420 Using Tony's unifail Method. Installation went of without a hitch no special bootflags used, and installation completed successfully and restarted the system as it was meant to. Had to boot of the USB drive to get everything working initially but once i got the SMBIOS and the chimera (chameleon, stolen and rebranded) 2.0.1 installed i can boot from HDD without a problem.
I have not used a DSDT file at all but installed the MB Pro 8.2 SMBIOS. Using chimera (chameleon, stolen and rebranded) 2.0.1 Bootloader with tony's Theme. Tony's multifail did not work at all as it always failed the install process however it did move the kext files into the right directory so only was a matter of repairing permissions using a Kext utility and then refreshing the cache with CHAMPLIST and then using the -f boot flag once after installing a new kext.
So far i have graphics, Audio, ethernet, bluetooth, trackpad (as a mouse) and keyboard all working. Now working on getting the Battery recognition, and sleep working right.. the Lat has the Intel Centino wifi card so no way is that gonna work.. since it is actually a work laptop and i do not own it i am not going to bother replacing the wifi card. so will do without.
Would like to get the Multi Touch trackpad working with gestures but not important as it is working as a mouse and thus sufficient for my needs.
DVD drive is recognised and working as well
Here is some specs from the system report.
Model Name: MacBook Pro
Model Identifier: MacBookPro8,2
Processor Name: Intel Core i5
Processor Speed: 2.49 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 3 MB
Memory: 4 GB
Speaker (Analog):
Default Output Device: Yes
Default System Output Device: Yes
Manufacturer: Voodoo
Output Channels: 2
Current SampleRate: 48000
Transport: Built-in
Apple Bluetooth Software Version: 4.1.3f3 11349
Hardware Settings:
Address: D0-DF-9A-B2-42-C0
Manufacturer: Broadcom
Name: Bluetooth Mac (d0-df-9a-b2-42-c0)
Firmware Version: v3 c517
Bluetooth Power: On
ethernet:
Type: Ethernet Controller
Bus: PCI
Vendor ID: 0x8086
Device ID: 0x1502
Subsystem Vendor ID: 0x1028
Subsystem ID: 0x0493
Revision ID: 0x0004
BSD name: en0
Kext name: AppleIntelE1000e.kext
Location: /System/Library/Extensions/AppleIntelE1000e.kext
Version: 2.1.7
Intel HD Graphics 3000:
Chipset Model: Intel HD Graphics 3000
Type: GPU
Bus: Built-In
VRAM (Total): 384 MB
Vendor: Intel (0x8086)
Device ID: 0x0126
Revision ID: 0x0009
Displays:
Display:
Resolution: 1366 x 768 @ 60 Hz
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Built-In: Yes
System Software Overview:
System Version: OS X 10.8.3 (12D78)
Kernel Version: Darwin 12.3.0
Boot Volume: SYSTEM
Boot Mode: Normal
User Name:
Secure Virtual Memory: Enabled
Time since boot: 1:09
TSSTcorp DVD+/-RW TS-U633J:
Capacity: 4.55 GB (4,548,460,544 bytes)
Model: TSSTcorp DVD+/-RW TS-U633J
Revision: D600
Serial Number: R7216GUB834192
Native Command Queuing: No
Removable Media: Yes
Detachable Drive: No
BSD Name: disk2
Power Off: No
Async Notification: Yes
Media Name: W7SP1_PROFESSIONAL
Partition Map Type: Unknown
S.M.A.R.T. status: Not Supported
WDC WD2500BEKT-75PVMT0:
Capacity: 250.06 GB (250,059,350,016 bytes)
Model: WDC WD2500BEKT-75PVMT0
Revision: 01.01A01
Serial Number: WD-WX31A8173874
Native Command Queuing: Yes
Queue Depth: 32
Removable Media: No
Detachable Drive: No
BSD Name: disk0
Rotational Rate: 7200
Medium Type: Rotational
Partition Map Type: GPT (GUID Partition Table)
S.M.A.R.T. status: Verified
Volumes:
disk0s1:
Capacity: 209.7 MB (209,715,200 bytes)
BSD Name: disk0s1
Content: EFI
SYSTEM:
Capacity: 249.72 GB (249,715,376,128 bytes)
Available: 237.47 GB (237,465,997,312 bytes)
Writable: Yes
File System: Journaled HFS+
BSD Name: disk0s2
Mount Point: /
Content: Apple_HFS
Volume UUID: AD5457A8-9F0A-39D7-883E-C24D36DA660F