OP has bluetooth problems. I had many other problems and after some googling I've found that all of them were well known and were not fixed. You can digg in my comments for more details. One of them : My machine just didn't even boot after update ... It didn't boot without 'another' mac. What genius decided that to revive my machine I should have another machine? But even during this process it barely worked after ~10 tries because ... well bugs even there. With all my huge experience I couldn't figure out the scenario that was working for sure ... just pure luck. This is horrible experience I think.

For me there is no sense anymore to discuss each and every problem specifically when I sense tendency. I wouldn't make noise about few unfixed bugs but it's scary to see the tendency toward poor quality when your workflow and your sw project depends on MacOS.

How I suppose to make perfect file manager if underlying OS is not functioning properly?