Bluetooth Keyboard Connectivity Issue after MacOS Update

The issue appeared around November 2020, which is when the Big Sur released. I bought my MacBook Pro 2020 in August, and before there was no issue on connecting bluetooth keyboard to the laptop.

However, after I updated the OS, the MacBook wasn't able to find my keyboard, I tried multiple ways, kept shut down and reboot the laptop, but it still doesn't work. At the beginning, I thought it was my keyboards problem, so I just changed back to the wired mode.

However, a few days ago, I bought a new keyboard from Keychron, which should work well on MacBook. But it turns out that even my KeyChron K2 bluetooth keyboard wasn't able to connect to the MacBook. This just shows that there is something wrong with the brand new OS, and Apple have not fixed this issue for months.

I find lots of people complaining about it, but still, the issue exists, and it seems that it won't be fixed for the next few months...