有个老哥是重新插拔了 io board 解决的（只针对老机器）
1 month ago
Luckily, I came across a strange but working temporary fix using a windows bootcamp installation posted by Milangoa in this thread:

https://www.reddit.com/r/MacOSBeta/comments/jk72ki/black_screen_while_upgrading_to_bigsur_1101_beta/

The official Big Sur Update went without any problems on my Mid2014 13" MacBook Pro. However, when turning the machine off yesterday I was not able to start it and encountered the black screen just after turning it on. I was able to start the machine by unplugging the i/o board, then I held the option key and the bootcamp boot options appeared, however the WiFi option was not shown. I hot plugged the i/o board and booted into my Windows 10 installation which resides on an external USB drive. At first boot WiFI did not work but the USB port on the i/o board and bluetooth worked without a problem. Then I restarted the machine again straight into bootcamp and on the boot options page the WiFi option was already shown and then also worked in Windows. After that I restarted again and booted up Mac OS Big Sur and everything just works like before. Waking up from sleep mode and rebooting seems to work fine for now. What does not seem to work is to shut the machine down, because afterwards its again just showing the black screen.

19 年的质量也不咋地，刚过保 4 个月，升级系统第二天就挂壁了，变砖头

我的屏幕修 5800，修不起

看三立新闻比这有趣多了哈

留意下马家龙附近房子，我住的那块有几个房子空出来了

给 lz 点赞

#42
@linearsky 对技术理解和管理深入 我觉得人是靠谱的，我第一感觉是同官方有政策合作补贴，疑问就是业务是还在研发阶段，是否有一个小 mvp 模型验证过了？

@xytdj 給樓主和大家道歉，情緒比較激動，很忐忑的到了約定時間準備電話溝通，結果沒有人聯絡，加上之前的一些新聞，所以就激動了。樓主不是騙子 ，再次誠懇的道歉

@meathill 这个问题，我想了下，远程需要的竞争优势需要有责任心、沟通表达能力、自驱力（自我管理能力）以及信任度，感谢老哥

随时喝水

还不错～