Mike van den Brink

Okay first ill try the InjectAll way and then I will make an USB Map and share with other XPS owners.

The older SMBIOS MacBookAir8,1 isn't changing anything. My XHCI Controller dortania/vanilla-laptop-guide#1 is "\VEN_8086&DEV_34ED&SUBSYS_08B01028&REV_30\3&11583659&0&A0" dortania/vanilla-laptop-guide#2 is "\VEN_8086&DEV_8A13&SUBSYS_00000000&REV_03\3&11583659&0&68". You are my hero if you can make that kext for me.

I have tried the kext. It did not boot up and got the same Still waiting for root device error. When I imported the kext in to config.plist it got...

It still won't pass the Still waiting for root device. The SSDTime patcher output is here: http://www.mediafire.com/file/836jgn0bg5hr2kh/patches_OC.zip/file

Maybe the OpenCore log helps: `00:000 00:000 AAPL: [EB|#LOG:INIT] 2020-05-17T21:33:31 00:117 00:117 AAPL: [EB|#VERSION] bootbase.efi 422.100.16~14 (Official), built 2020-02-29T16:54:28-0800 00:226 00:108 AAPL: [EB|#BUILD] BUILD-INFO[310]:{"DisplayName":"bootbase.efi","DisplayVersion":"422.100.16~14","RecordUuid":"0D6170BC-EA81-4EE7-B3B5-1D6A5DDB253B","BuildTime":"2020-02-29T16:54:28-0800","ProjectName":"efiboot","ProductName":"bootbase.efi","SourceVersion":"422.100.16","BuildVersion":"14","BuildConfiguration":"Release","BuildType":"Official"} 00:340 00:113 AAPL: [EB|`H:IS] Err(0xE) @...

I also see some unsupported speed mantissa errors for several XHCI ports. With USBInjectAll or with your kext.

Here is my whole usb + DSDT dump: https://drive.google.com/file/d/1d2eGrsXcwI2YihPgQFbPlClSM0xxkGah/view?usp=sharing I hope this is what you need.

Here is my ACPI Dump on Windows: https://drive.google.com/file/d/1t3u0XSFGX7kg0gsgohFtdKYNzrtWSGyB/view?usp=sharing

Here is the acpidump in separated .dat files. https://drive.google.com/file/d/19Wg9xaGyd3naukEYn49fpeBLwRa7GLTx/view?usp=sharing

@khronokernel My USB problem is solved! But now my problem lies with AppleIntelFramebuffer/AppleIntelClocks.cpp "Wrong CD clock frequency 0x249f0000 set by EFI".