Hervé

Afaik, you can only run off the HD4600, the discrete AMD GPU is not supported (yet?).

Jake has posted several posts about the method to fake desktop HD4600 GPU (id 0x0412) with kexts. I'm sorry I don't have links at hand but you'll find them in the guide section or through the Search engine. You can also consult my E6440 Mavericks/Yosemite guide which fully details the methods I followed to patch the Azul frame buffer kext to support the mobile HD4600 GPU (id 0x0416). The exact same principles will apply to your HD4400. PS: afaik, Chameleon boot parameter "IntelAzulFB=xxx" is ineffective with Yosemite. With my E6440, it worked perfectly with Mavericks, never with Yosemite. I had to patch the DSDT.

That's quite normal, but can you confirm you reached the Yosemite desktop? You now need to finalise tuning to obtain graphics acceleration. You could do that either by faking HD4600 Desktop or by patching the graphics kext.

Again, all the necessary kexts and files are in the D630 pack I posted... You don't need EDP, which happens not to work at this time.

You probably have the wrong DSDT with unsuitable graphics settings for your particular LCD. What's its resolution?

No reason why it would not work. You can use my E6440 guide and adapt if necessary. I've linked to it on post #52. It'll depend on your own system's specs but it should be very similar to the E6440.

You need to set up the clover config.plist correctly for your own model, depending on specs. Could mean unselecting all DSDT fixes, selecting (or not selecting) kernel and/or AICPUPM patch, etc. I still haven't managed to boot the Clover USB installer on my C2D-based D630 either...

Open up the DSDT.aml file with a tool such as DSDTEditor, then do a search for "EHCI" and replace by "EHC1" (there could be a couple of instances). Compile the edited code and save as DSDT.aml. Place the newly compiled DSDT file in the Clover folder and reboot.

Are you building a myHack installation with our OSXL bootpack? Or is it some other method or a distro?

Maybe you're not using the correct bootpack for the Lion installer. You can use those I posted for the D630 X3100.

Sure, there are many guides on this forum for the E6x30 series. Use the "Search" facility.

BIOS settings all supplied at the top of the D8xx section...

No kext needed to support SATA drives.

Apple's Security Update 2015-004 will again break MPLF. In addition to the same files as mentioned above, it also installs IOSurface kext v86.0.5 in /S/L/E. A rollback to attached version v80.0.2 is necessary to fix the MLPF installation. IOSurface.kext.zip

Well, you obviously need to undertake the same graphics tuning you did for Yosemite... Mobile HD4200/HD4400/HD4600 are not natively supported by OS X to date.

Unselect all fixes under DSDT fix mask.

I've done a complete fresh installation using a Clover-based 10.11 USB installer this time. Process is same as for Yosemite, using the following well-known/well-documented method: Double click on InstallESD.dmg found in Install OS X 10.11 Developer Beta.app/Contents/SharedSupport to mount the dmg image Then mount BaseSystem.dmg (hidden file) open /Volumes/OS\ X\ Install\ ESD/BaseSystem.dmg Use Disk Utility to restore the contents of BaseSystem.dmg on a USB key (or HDD partition) formatted Mac OS extended (journaled). Remove link for Packages in folder System/Installation of your USB key rm /Volumes/OS\ X\ Base\ System\ 1/System/Installation/Packages Copy folder Packages located in InstallESD.dmg to folder System/Installation of your USB key cp -R /Volumes/OS\ X\ Install\ ESD/Packages /Volumes/OS\ X\ Base\ System\ 1/System/Installation Copy the 2 hidden files (BaseSystem.dmg & Basesystem.chunklist) of InstallESD.dmg to the root of your USB key cp /Volumes/OS\ X\ Install\ ESD/BaseSystem.* /Volumes/OS\ X\ Base\ System\ 1 Install Clover v3224 to the USB installer. Keep default settings, just change bootloader option to install in MBR Place the attached DSDT + SSDT in EFI/CLOVER/ACPI/patched Place the attached kexts in EFI/CLOVER/kexts/other Use the attached config.plist file or adjust the options as follows at the Clover Boot Manager main menu once booted off the USB key: in DSDT fix mask, unselect Fix Display + Fix USB + Fix sound in Binaries patching, select AppleIntelCPUPM At the Clover boot Manager main menu, select the 1st listed partition ("Boot Mac OS X from OS X Base System"), press space and select boot without caches. The OS X installer will then load If/when prompted for USB keyboard and/or mouse, just press [ENTER] twice Proceed with OS X 10.11 installation as usual DSDT.aml.zip i5-2520M_ssdt.aml.zip kexts.zip config.plist.zip I've not managed to boot the installer of 0S X 10.11 with Chameleon yet, but here are copies of the kernel (to be placed in /S/L/Kernels as per Yosemite) and of the patched AICPUPM kext (to be placed in /S/L/E). As always, the i5-2520M SSDT must only be used on E6220 models fitted with that specific CPU. Other CPU models will require their own specific tuned-up SSDT which can easily be created by the usual SSDT Generator tool.

Try an use a recent version of Clover.

Device (EHCI) must be changed to Device (EHC1) in the DSDT or external USB ports will be dead. I much prefer the system with working USB ports!

myHack v3.xx never supported Yosemite so I think it would have been difficult to create a myHack Yosemite installer. If you did, tell us how because you'll make lots of people happy. More seriously, I've recently posted full packs for the D630 nVidia, so don't hesitate to use that as a workaround to the current EDP issues.

Manufacturer's online support->model documentation is usually the best (ignored/forgotten) place to find system's specs. A basic Google search on "XYZ specs" usually leads good results too... For the more techies, the output of lspci -nn Terminal command or of DPCIManager tool will give good pointers.

If attempting Yosemite, please open up a new thread; this one is entitled "Mavericks", so let's be a little disciplined... For Mavericks, I encourage you to create a myHack installer with the generic bootpack to start with. An nVidia 9800GT should be supported with Chameleon option GraphicsEnabler=Yes but may require some adjustments (DSDT injection/patching, kexts rollback or use of modified IOPCIFamily kext to avoid black/white screen). Booting in safe mode (-x Chameleon boot flag) would normally get you to Mavericks desktop, with minimum graphics support (i.e. VESA mode) in all likelyhood. Look here for details of what I'm talking about, keeping in mind that it may not apply to your HP desktop of course. If you take the nVidia card out and opt for the integrated HD4000 of your Ivy Bridge i7-3770 CPU, you'll probably have to experiment with the Capri FrameBuffer to obtain working graphics. I also encourage you to read RampageDev's most excellent blog pages on HD4000 graphics. There are also more details on HD4000 graphics here.

Still (very) early days, but Apple's latest OS X version does install and run Ok on the E6220. There are many issues of course, the most important one being lack of support for the USB2.0 ports. Installation was done using the following method: installed Clover v3224 on a totally blank/wiped-out USB key copied E6220 DSDT to EFI/CLOVER/ACPI/patched folder of USB key copied bootpack kexts to EFI/CLOVER/kexts/Other folder of USB key (only copied kexts like FakeSMC, PS2Controllers, etc., not patched graphics kexts of previous OS X origin like Mav or Yos - kept patched AppleHDA on the other hand) cloned existing myHack-based Mavericks partition on a new partition on the disk double clicked on the Install OS X 10.11 and installed on the cloned partition after a few mins/seconds, proceeded with system reboot rebooted via Clover USB key at Clover menu, set options as follows: in DSDT fix mask, unselected Fix Display + Fix USB + Fix audio in Binary patches, selected AppleIntelCPUPM patch returned to main menu and selected the newly created OS X installation partition listed ("Boot OS X Install from ...") 10.11 installer booted and offered the usual installation application. Installed on the cloned partition Remember, it's (very) early days, so you will find bugs. It's not something to use as a daily OS yet... Must now attempt: proper Clover-based USB installer bin patch of vanilla AppleIntelCPUPM kext to attempt booting from Chameleon

No, off-topic DW1560-related posts were moved to a more appropriate section: hardware queries. It's not a topic limited to the E7250 but applicable to many other systems.

And, ideally, don't mix Kext Wizard and myHack. If you install kexts in /S/L/E, simply re-run myFix (quick); at worst, manually repair permissions prior to running myFix with the usual Terminal commands: sudo chmod -R 755 /System/Library/Extensions sudo chown -R 0:0 /System/Library/Extensions All patched kexts placed in /S/L/E will be lost after any update, that's the drawback...