E5470: unable to install Monterey

[huyhoang]

Hi @Jake Lo, I have tried the E5470_OC_0.7.5.zip posted here with MAC OS MONTEREY 12.1. But it can not complete install and it show message "A required firmware update could not be installed" when I finish first step instal
Like this:

 

But I install Big Sur 11.6.2. It is working well

I have update lasted Kexts

[Jake Lo]

Might just need OC 0.7.6

Give this a try

 

E5470_OC_0.7.6.zip

[huyhoang]

Thanks, i will try now :), thanks for your help

[kcmok]

Don’t understand why need to include both Airportltlwm_BS.kext and Airportltlwm_Monterey.kext.

Try to remove one of them and it doesn’t boot.

[Jake Lo]

for dual booting. BS will only load for Big Sur and Monterey for Monterey only.

[kcmok]

I was not able to use ProperTree to do a “OC Clean Snapshot” of the OC folder. Wonder how the config.plist was created. How’s the dual boot done?

[Jake Lo]

I use the sample.plist as base and edit it with plistedit pro.app.

As for dual boot, just create 2 partitions and install each OS on each partition.

[kcmok]

I meant where in the config.plist does the choice of the correct Airportltlwm.kext executed. Both Airportltlwm.kext are enabled.

I follow Dortania’s install guide, was able to make wifi work but not Bluetooth. With your EFI both wifi and bt work. I’m not able to identify how you can make bt work fron your config.plist. Can you explain your approach to enable bt?

config.plist.zip

ACPI.zip

[Jake Lo]

it's in the minKernel/ maxkernel declaration

BS kernel version is 20.0.0 to 20.9.9

Monterey starts at 21.0.0

Same for Bluetooth kexts

Bluetoothinjector supports up to BS but crash for Monterey, so BlueToolFixup.kext is use instead.

So setting the maxkernel for BTinjector to 20.9.9 will prevent it from running in Monterey.

And setting Bluetoolfixup to run starting at minkernel at 21.0.0 will only load for Monterey.  

 

Hope that's somewhat clear.

[kcmok]

Thank you for the detailed explanation.