RuiZH

I am very appreciate your reply,I'll try it a few day later

get HPET from Maciasl No error,restart computer output no devices

I tried it ,no lucky

EFI.zip

thanks your reply,updated ethernet driver to latest,no work

about my machine:

Mainboard:    BIOS Star B250ET2

Enthernet:     Realtek 8111

Sound card: Realtek 887

CPU:intel core i3-7100

Graphics: HD630

BootLoader: OpenCore 0.6.1

Today I upgraded my desktop computer from 10.13.6 to 10.15.6. After the completion, there is no network and sound. The sound card (rtl887) and network card (rtl8111) drivers use the latest version

 

Did i upload efi folder?