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If not encountered this problem, won't learn more about kext. Thank you very much!:thumbup:

OK, I will try again. What's difference with them? Do I need to delete BrcmFirmwareRepo.kext? If yes, how can I delete?

Finally solved. It seemed to be my kext injection method is not right. Followed this guide to install these kexts again and all problems solved. :) AppleALC.kext Lilu.kext WhateverGreen.kext BrcmBluetoothInjector.kext BrcmFirmwareData.kext BrcmPatchRAM3.kext

I tried this again, set inject kext to "Yes", then BT is ok now, however, the audio is still missing. Also the keyboard for adjusting light are not working. What would you suggest for suspect? Does it has anything to do with this usb inject or audio inject?

Yes, when I first installed OS, I followed this guide. But when updated to Catalina, there is wifi, BT, audio & keyboard problems. I used your files yesterday and solved all but BT problem. Now even I put back all the files deleted to make all files like yesterday, all the problems remained...

I tried put back just Generic USB kext or both of them, the new problems persist. There is keyboard problem and no audio device:mrgreen:

Not working, lost some keyboard function and sound card. I will try to put back GenericUSBXHCI.kext and restart again to see.

attached the whole EFI folder. Is there any settings in other files need to be changed? Thanks.

Added profile. There is BT info in SYS INFO. Card model is BCM94352Z. Any suggestions?

I followed this instruction, solved the wifi problem. However, the BT icon looks like this . It's not working and I can't turn it on. In system report, BT doesn't exits. When in Majove, the BT works fine. I put these 4 files both to Clover and /Library/Extensions folders...

I followed this instruction, solved the wifi problem. However, the BT icon looks like this . It's not working and I can't turn it on. In system report, BT doesn't exits. When in Majove, the BT works fine. I put these 4 files both to Clover and /Library/Extensions folders...