Jake Lo

Try this, just adding back SSDT-BRT6 and patch 5570-BrightnessFnKey.zip

@mosfet51 Your Micron 2200s NVMe is not supported. Replace with a compatible NVMe drive.

1 and 2 are handled by Whatevergreen and AppleALC I just enable HDMI on Con2 as Herve mentioned on #3, actually the config already has con1 enable for HDMI, but I guess for your system it's on con2. I guess Con1 is VGA 4 is already enable in the Config otherwise your system wouldn't already rebooted when you plug in the cable.

try this config.plist.zip

Make sure to select reset NVRam the 1st time

At the OC picker, select the OS you want as default to load, hold Ctrl + enter. Next time your reboot, it'll automatically boot to that OS until your reset NVRam of course.

post your file

@robi62 According to your vanilla DSDT, SSDT-810G2&G3Bat.aml would be the best patch for your battery. SSDT-8x0G1h.aml you're using also include a battery patch, so removing it should work.

@JoeLee.KR Give this a try Use my generic EFI here and add the attached contents to /EFI/Clover This will give you the bootpack X1G2.zip

Give this a try, replace Config file Add ssdt* to ACPI folder Add kexts to *Kexts folder to your files Latitude 7400 OC_0.6.7.zip

You'll need to be connected to the internet to complete the install, use the ethernet. I don't think your wireless will work yet.

Please post the OC folder along with IOReg file using IORegistryExplorer.app v2.1

2 totally different system, obviously won't work Go ahead and post the system's full spec

Try resetting NVRam at OC picker

How about Headphone, does it work there? Did you patch for IRQ (ssdt-hpet.aml)?

which version of clover did you use? you can download the generic EFI from my guide and then add the boot files I attached here.

From what I had read, the best result would be to use 0300923E and iMacPro1,1

Go check out our FAQ section regarding supported wireless cards

add to boot arg -no_compat_check but you'll need a bootable disk to get back into the system 1st.

@jantestmac Check the BIOS under boot Option. If you see Opencore as a boot option, delete it. Then add a new one, call OC (or whatever), point it to /EFI/OC/Opencore.efi

@duongdanhdoan give this a try, replace your config, add ssdt* to ACPI, and kext to Kexts folder I disabled some duplicate ssdt's from your Config file I also disabled your DSDT, not sure what you have patched. There're no battery patches needed as far as I know for any Latitude Model. You could've kept the AMD as well and disable it via SSDT patching and use it in Windows if you're dual booting. Fixes should include: Fn+F11 and Fn+12 for Brightness Realtek SD card reader Sleep E5570_fixes.zip

@DJKim Try this, replace the Config file and add these kexts to the Kexts folder E6230_DW1550.zip

Big Sur takes a lot longer install, so have some patience and wait. I believe it take 3 - 4 reboots before completing.

post your files for Big Sur

Here, replace Config file, add SSDT* to ACPI folder and kext to Kexts folder Fixes include: Audio Fn+Arrow for brightness Control HDMI Video / audio SD Card reader Touchpad USB (maybe) E5440_Fixes.zip