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HELLO ALL I have successfully installed macOS Big Sur beta 5 using OpenCore 0.6.1. everything works as expected. my specs: Dell Latitude 7280 (core i7 7th gen) Intel HD620 Graphics 8gb DDR4 Ram 1080p IPS display 256GB SSD note: I'm using intel wifi 8265 which also works great thanks to Itlwm.kext and heliport (which i have removed from EFI). please find the attached EFI with latest updated kexts to use for similar systems. Enjoy. EFI.zip

I suggest you investigate what a DW1506 card is based on.

Skylake - 0x193B0005