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It took me sometime to fix the Webcam and the USB issue but its all working now, including internal SSD. The only thing not working is the HDMI video, as soon as I connect the HDMI cable, the screen goes black / grey and I have to shutdown because I don't see anything anymore. Here is the...

Hi, If you managed to get E6540 working with AMD Radeon HD 8790M could you please share some info like your EFI folder , etc... please. I am currently running 10.14.5 Mojave with Intel(R) HD Graphics 4600 but I really would like to use AMD Radeon HD 8790M + HDMI if possible Thank you.

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Sure, I have updated it and also I have attached the Clover dump files here as well as complete darwin dump files. Thank you for trying but unfortunately it didn't actually make any difference, the 128GB External SSD USB as well as the Internal one were not recognized. I hope the files I...

Thanks but even if I place AppleAHCIPort.kext in /L/E it still doesn't work. Need to fix USB first for Catalina then I will look into the HDMI Sound Sync issue.

I have Catalina Beta 3 working on my E6540 but I still have 2 main issues I need to fix and would appreciate some assistance please. 1- Only the mouse USB and a 2GB USB are working but not if I insert an Additional SSD USB or Internal 2nd SSD Drive 2- HDMI works but sound is not synced...