Hervé

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...

Thread cleaned up and locked. This guide is somehow deprecated as it mostly applied to pre-released Yosemite versions and more recent, more accurate guides were published since. All support queries to be posted in the Help and Support->Dell systems-> Latitude E Series section of the forum.

Jolly Roger, please post specs of your laptop. If you've got a different CPU, boot without SSDT and you may have to add NullCPUPowerManagement until you generate your own CPU-specific SSDT to handle native CPU power management.

You may need to use the very recent version that was published with apparent support for 10.11. v3224 if I'm not mistaken. Hasn't worked for me yet...

You may want to refer to this recent thread for guidance. You can create your Mavericks installer with myHack + 10.9(.0) Installation app/ESD dmg or 10.9.5 Installation app/ESD image, it depends on what you've got at hand. As stated by Jake, you obviously can't use a Combo Update image to create an OS X installer... If starting from 10.9(.0) you should have no issue at all running the 10.9.5 Combo update thereafter, once you've fully finalised your original 10.9(.0) installation.

Did you try this Mavericks guide? I honestly can't see how you could possibly go wrong with myHack + Mavericks, assuming you've got the right OS X installation app of course, not some torrent download...

El Capitan DP was only released last night. Give people a little more time before asking for support. No-one's probably even had time to work out a validated installation procedure...

Off-topic but to quickly answer your question, E6420/E6430/E6440 all have Sandy/Ivy/Haswell CPUs with fully support integrated GPUs (HD3000, HD4000, HD4600). Have a look at the guides posted here. You may also want to look at other fully supported E6xxx models such as the E6220/E6230 or E6320/E6330 (even the bigger E6520/E6530 if you want).

Just verified behaviour on my E6220: with or without DSDT + GE=Yes/No, I systematically get full QE/CI with the built-in HD3000 (dev id 0x0126) and vanilla graphics kexts. In my particular case of a 1366x768 LCD, I don't need to set DualLink to 1 of course.

Look at the guides for E6220/E6320/E6420 of similar specs. HD3000 is normally supported OOB, you only need a patched FrameBuffer kext to support VGA output and/or HDMI output, otherwise the vanilla kext will do. With a HiRes display such as yours, you need to enable DualLink through Chamleon boot plist (if applicable of course) or through DSDT.

Can't say I saw any...

If your AppleIntelPIIXATA2 does not load from the Clover kext folder, try to place it in /S/L/E and repair its permissions.

Contact EmlyDinesh then.

Do a low-level formatting using some of the freely available Windows tools. That will most certainly wipe out all existing partitions that may not be deleted by a "standard" repartitioning, especially the hidden ones.

Difficult to say if one is better than the other. One is Broadcom-based, the other Atheros-based. Both are A/B/G/N cards and work OOB. I tend to prefer Atheros due to ease of use with eventual DSDT patch.

So... EBIOS errors are gone?

You could always download a fresh copy of the 10.9.5 Combo Update and try apply it again.