

I don't know if this is going to work but at least I don't see a black screen. I also connected the computer via ethernet cable in addition to WiFi just in case the issue was a faulty (unlikely) wireless connection.

Right now it looks like it is either downloading or running the install with 18 minutes remaining. I now have restarted the computer pressing down command and R before the chime to enter recovery mode and run disk utility's first aid and then Reinstall Big Sur utility. Now I have restarted the computer and it got worse, it only shows a black screen sometimes and some other times it shows password recovery screen. Some people online recommended to click on the power button and it would "wake up" the install. Looked again this morning at 9:00 AM and it was still at the same place.

My Big Sur install started last night around 8:00 PM and by 2:00 AM the progress bar was almost to 100% but it didn't move after that. It is mind-boggling to me the fact that Apple is not jumping in to help with this issue. (Sorry for my bad English is not my native language) It seems that for some reason the download progress bar is not giving the right percentage/results or for some reason is saying that is everything downloaded but is not. And than after some time will get stuck again and you do the same 1 and 2 steps above and you will see that the download is growing little by little I did this 3 times.Connect network again and click " upgrade" button (you will notice that the download is not anymore at 12.18GB but is not also starting from beginning maybe it will be half downloaded and starting from this point).After download reaches 12.18GB and get stuck, disconnect internet connection and then download will stop.If the download is on 12.18 GB and you restart the computer, you lose all downloaded data and you have to start from the beginning to download it.Maybe apple will solve this later but I have noticed the following:.

