Hervé

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.

You can try others like VoodooBattery of AppleSmartBatteryManager. All available on the web.

Well, first of all you did not specify which kext you're using... Then I suggest you look into the bootpacks I recently published and grab the battery manager kext from there.

It may not influence things but: you've set nVidia to true at the same time as Intel you're not faking Intel desktop model id 0x0412

Did you try to simply reset the BIOS to default settings and then just configure SATA mode to AHCI? I found this necessary a couple of times after getting unexplained KP such as yours...

Are you sure you've got the bootloader installed properly on your keys? How do you partition/format them?

Flat CMOS Battery would normally trigger a BIOS error at power-on as the other settings would be back to default too.