Hervé

In terms of specs, it's pretty close to HP's EliteBook 8560w mobile workstation for which Mavericks was a pretty easy installation. See here: https://osxlatitude.com/index.php?/topic/6536-hp-elitebook-8560w-with-i7-2630qm-and-nvidia-quadro-1000m-mavericks/ Obviously, that Intel wireless card will have to go...

You have a FSB issue -> CPU reported at 2.54GHz and RAM at 761MHz...

I disabled all DSDT fixes enabled by default in the config.plist and put the D630 DSDT in EFI/CLOVER/APCI/patched. I also placed all bootpack or /E/E kexts in EFI/CLOVER/kexts/10.10 and, consequently, booted with option "kext-dev-mode=1". I think that's about it. Check what you have by default for graphics injection. I think I had ATI to false, Intel to true and nVidia to false when I 1st booted the Yosemite installer key.

On paper and in theory, everything can work. There's only one way to know for sure...

Try and reset BIOS, then set HDD mode to AHCI.

boot with -v flag and try and make out where system resets/what the last info displayed is...

It'd be most useful if you would list/explain those modifications you made to get microphone (and all functions) working rather than just say you got it working...

Did you try the flag -nossse3bit? http://www.macbreaker.com/2012/01/list-of-common-hackintosh-boot-flags_29.html -nossse3bit Enables SSSE3 emulation for AMD Hackintoshes. Ever since Mac OS X Lion, Mac OS X has required the SSSE3 instruction set to run properly. However, AMD didn't add SSSE3 to their processors until 2011, meaning that only AMD processors with a "FX" in their model number (e.g. FX-4100) natively support the instructions needed by Mac OS X. If your computer uses an older AMD processor (i.e. anything from the Athlon or Phenom lines), you may have to use this boot flag to enable "emulation" of the instructions instead. You can try and contact Bronya at InsanelyMac.

Piece of cake. Made a Clover installer (lots of tutos on IM) than copied the kexts from my Mav /E/E to the Clover USB key and booted straight through to install Yosemite. Because I installed 10.10 on my HDD whith existing Chameleon-based installations, I still boot 10.10 via my Clover USB key. I still have some tuning to do though, not everything works (like sleep)... Conti's working on an updated myHack version, so watch this space!

I guess Niresh installed that patched kernel, so you might as well keep your installation as it is. With a vanilla build, you would simply overwrite your mach_kernel file at HDD's root by the patched one. For the rest, well it all depends on the HW you have and you did not specify any of it (other than HD4600 graphics), so who knows?...

Haha, hello Arthur. You might have guessed, we don't make a living out of this! Unlike some... Hey, we're not as reactive as on IM, but we're only a small (but nice?) outfit! Which version of OS X are you trying to load this BT kext on? Could it be that the kext has a minimum OS X version specified in its Info.plist and that does not match your installation?

You don't need to compile a kernel. With your Haswell platform, you just need the patched Haswell kernel and that's readily available.

Well, I thought I'd give that DP1 a try... Yeurk, I can't say I like it. Flat interface, far less colours than in previous versions, smaller fonts and icons (what they call "black mode with transparency" - transparency can be disabled, but not black!). I find that flat dock horrible after the really nice 3D versions we enjoyed since 10.5! Overall, it's very different from what we were used to since Leopard. It feels slower than Mavericks too... Things have definitely changed. I'll certainly be sticking to 10.9 for a while. 'not putting the D630n through that torture. But, hopefully, things will evolve and become adjustable by the time GM goes out.

Well, maybe it depends on the SMBIOS profile you opted for + SMC keys you may have/have not used.

Use a valid SMBIOS profile, that'll help. You also seem to be running SL 10.6.8 from a virtual machine...

I'm the one who added this specific reference to Paxville DP CPUs; for the rest and as I said, see with Bronya if you believe SSSE3 is not emulated.

You'd have to see with Bronya for that... SSSE3 emulation is a kernel matter.

Did you check your power saving settings in the Preference Panel?

Is this in Sys Profiler? How about in tools such as HWMonitor. You can always try to repair disk permissions and/or run myFix (quick).

Make sure you use the right boot pack and all should be Ok with myHack USB installer. BIOs should be configured as per recommended settings in the dedicated thread in this very section. So just read the web site and forum.

@ssprod: What do you exactly mean when you say in point 5: "erase Windows partition"? I hope you did not actually delete the FAT partition to recreate a new one, but simply reformatted the partition NTFS. If you really did delete the actual partition, you can restart it all from Mavericks, i.e. recreate the target Win7 partition in Disk Utility and format it FAT. Then reboot to your Win7 installer and install Win7 but do not destroy the Win7 partition, just reformat it NTFS and proceed with installation. How did you organise your disk partitioning in Disk Utility? Is your Mavericks partition 1st and Win7 2nd? I'm also wondering why you're booting off your myHack USB installer and not your HDD directly? Didn't you install Chameleon on your HDD?

Compare the USB sections of both DSDT files. When sleep is not working, it's usually an issue with USB ports.

Configure your D820 in the same way as a D620 and you'll find everything works fine. It's all explained in various thread in the D6xx/D8xx section of the forum. Don't hesitate to use the Search facility.

Use an older version of Flash Player, like v11 or v12.

Mmm, 'had a quick look at the Dell Latitude XT online documentation. It stipulates AMD RS600ME/SB600 chipset with integrated graphics Radeon X1250 and PATA/ATA66 ATI controller. Unless you can find support for that controller through some specific ATA kext, there's little chance to get your internal HDD supported. To top it all, I fear you'll probably never have graphics support for that ATI Radeon X1250 beyond Leopard or Snow Leopard (if at all supported in those). For your HDD, have a look here, here, here or here. To be honest, you'll probably find OS X on your Latitude XT to be a dead-end.