https://wccftech.com/macos-big-sur-bricking-older-macbook-pro-models/

Apple’s latest software update for the Mac lineup, macOS Big Sur, is seeing a torrid launch so far. After failing to download on its official release day due to server problems on Apple’s end, some older MacBook Pro owners have stated that the update has bricked their machines. Since many users have reported the same issue, it should conclude that the problem is widespread.

Several older MacBook Pro owners on MacRumors forums, Reddit, and Apple’s support communities are reporting about the problem. One Reddit user going by the handle u/josha57 has reported the experience below, saying that the older MacBook Pro in possession is displaying nothing more than a black screen.