Catalina Beta 7 bricked my Macbook Pro I have installed macOS Catalina Beta 7 on my MacBook Pro Late 2013. After installing, my Mac prompted me to Restart. While installing the update I noticed that the Apple Logo with the progress bar disappeared. Shortly after, the screen went black and the Macbook froze. I tried a hard reset, but it keeps booting to the "question mark" folder. I tried several boot up methods, clearing NVRAM, starting in safe mode etc, but the Mac simply ignores my keyboard inputs while starting up. My guess is that the Firmware / EFI got corrupt because I can't use any of the key combinations. I can only boot to the question mark folder.

Does anyone have any recommendations or ideas?
Thanks in advance and sorry for my bad English :) !
I had the same experience with my MacBookAir. Turns out Catalina killed the firmware and the only solution according to the Genius Bar is to replace the motherboard. That is around 500 Bucks in my case.