Please close other applications before updating gsa t40n
Using the terminal I removed the following kexts from the install HDs System/Library/Extensions folder I repaired the permissions in the terminal and removed the harddrive from the LACIE USB-case and put it back in the laptop.
Changed the Mo Bo to ACHI mode from BIOS and the laptop booted up nicely. t detected, so I had to use USB mouse and a USB keyboard to create the user account.
For Sound I used the Voodoo HDA but everytime I boot I can hear the microphone input, and I have to turn it off manually every boot. I can only access the internet by attaching an ethernet cable or tethering my jailbroken i Phone with Tether Me. Thanks, Drew Brookins For this Specific Dell with TPM, fingerprint Reader, Touchpad, Touch Stick, 1920x1080 screen, wireless Secure card ( rare and cool), standard secure card ( the kind you insert (common) etc.
Install Method: i Deneb 1.4 (10.5.6) The OS install using Ideneb 1.4 will not get past the MAC Framework successfully initialized using 16384 buffer headers and 4096 cluster IO buffer headers message. EDIT# Installed with i PC and used ACPI Fix (fixed buffer header error) . this appears to install and just run great minus the trackpad with sound and wifi and all the other devices from i Atkos distro.
Using the terminal I removed the following kexts from the install HDs System/Library/Extensions folder I repaired the permissions in the terminal and removed the harddrive from the LACIE USB-case and put it back in the laptop. When customizing install, select only those items you need. After restart, run the Dell Post Installer 1.41 to fix the audio.
Changed the Mo Bo to ACHI mode from BIOS and the laptop booted up nicely. t detected, so I had to use USB mouse and a USB keyboard to create the user account. None of the Post Installers worked for me so I used Pacifist to extract each package I wanted.
After firmware upgrade completed, the system will reboot and show the language selection page.
At which point it won't boot Mac OS X without reinserting Rebel EFI, once you boot the partition from Rebel EFI disk (it won't have drivers so you'll need an external mouse to restart) you restart and it will boot without Rebel EFI disk with drivers. Copy the Apple BCM5701into that Plugins folder, and overwrite if there's already one there. Now go back to /System/Library/Extensions and follow Steps 21-23, only this time use Apple PS2 If these install options were not helpful or faulty for your setup, please look in the forum listed below concerning questions and topics on this model.
You can get it from  Install Method: IPC OSX86 10.5.6 Beta First actualised using Windows XP BIOS on that laptop to version 3.0. You can skip the Registration screen, just click Continue and click Continue again when it asks you about the unfilled fields. Sound- downloaded DELL LAPTOP POST INSTALLER v 1.4.1 and played with the easy installer and it all worked- also modem works with conexant kext autoinstall.
Note: I didn't have DVD (destroyed) so used Plop Boot Manager on 1GB pendrive (this laptop only can boot from 1GB pendrive, and not all 1GB pendrives!!! Then I booted installator from 16GB pendrive (to make usb installator you can for example use diskutility in mac os x. wifi- Not working on intel 3945 internal wifi card - since I don't want to open up the case to install the working 1390 card- So, I use a belkin f5d7050 v4000 usb wifi with the ZDA21 mac usb driver- Please be patient with driver as it is slow to respond when setting up wep encrpyted AP .
Then it was time to find out how to get things working.
What works: System Version: Mac OS X 10.5.6 (9G55) | Kernel Version: Darwin 9.6.0 | Bootloader: Chameleon 2.0rc | Installed: Leopard Retail DVD 10.5.1 Combo Update 10.5.6 Install method: My install is an adaptation of Karaakeha?