Jump to content

[Mini Guide] Dell Latitude E7270 update Sierra to High Sierra

Recommended Posts

Hello. This is a mini guide to how upgrade Sierra to High Sierra on Dell Latitude E7270.


1- Generate a backup of your information, I recommend using time machine is a good tool that can help us restore our information.


2- Upgrade clover to last version. (latest available at time of writing).




3- Download apfs.efi.zip and put it in your EFI partition: /EFI/CLOVER/drivers64UEFI/. This is the new driver of Apple File System APFS.


4- Update Sierra kexts and place them under /EFI/CLOVER/kexts/Other/ (Create the folder if it doesn't exists). In my case, I'm using those kexts:


E7270 HS EFI kexts.zip


5- Download this config.plist.zip.


6- Edit config.plist with Clover Configuration. (Upgrade Clover Configuration to last version, in my case I'm using Clover Configuration 4.53)




and active Fix Headers option under Acpi.




7- Reboot Sierra and check the everything is OK. 


8- Download High Sierra from Mac App Store and follow instructions, The installation process will reboot your laptop, you will also notice a new option in Clover bootloader, don't move anything there, just let it reboot and choose the boot option automatically (if you have boot timeout activated it will boot with the new auto-selected option).


9- Finally, you must rebuild cache and repair permissions, open a terminal and execute the following commands:

sudo chmod -Rf 755 /L*/E*
sudo chown -Rf 0:0 /L*/E*
sudo chmod -Rf 755 /S*/L*/E*
sudo chown -Rf 0:0 /S*/L*/E*
sudo touch -f /L*/E*
sudo touch -f /S*/L*/E*
sudo kextcache -Boot -U /



issues detected:

1- HDMI doesn't  work  
    Fixed by replacing SMBIOS with MBP13,1
2- Problems with hibernation (When you close your laptop or sleep, the screen goes black and doesn't return the login option.) 
    See fix on post #9 below

Thanks Schiller and Jake Lo , for your contributions.



  • Like 1
Link to post
Share on other sites

Hello Jake, thanks for your comments. I changed the options on my archive config.plist. My HDMI works now. But the screen on my laptop goes black. This problems is the same when my laptop sleep.





The Legacy Option ROMs is disable.

Link to post
Share on other sites
  • Moderators

I can confirm the same issue on my E7270 running High Sierra, works fine on Sierra. So something must've change in the FB, will have to investigate.

Note: This issue doesn't occur on E7470, it's bigger brother

  • Like 1
Link to post
Share on other sites
  • Moderators

Both doesn't work. The internal LCD doesn't resume, just plain blank screen when connecting to HDMI or after wake from sleep. From the HDMI display I could see that both display is active, also in IOReg, it shows active, but LCD remains blank. It's not that the display brightness is decremented, it's just blank.

Link to post
Share on other sites
  • Moderators


I was able to get display to work properly after wake by replacing AppleIntelSKLGraphicsFramebuffer.kext from 10.12.6

I know this is not a fix, but a workaround temporarily until a fix is found.

Didn't test to see if it'll have any ill effect in the long run.

Sierra 10.12.6 org AppleIntelSKLGraphicsFramebuffer.zip



Injecting custom EDID fixes this issue, I'm now running 10.13.2

See here for instruction

I use "Apple MacBook Pro Display 16:10"


Credits to black.dragon74

  • Like 1
Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...