I thought you may like to know that (costs €7.So I downloaded the driver, installed it and rebooted my MBP. I have not tested it, as it will remove any motivation of finding a free solution 😛 One of my readers (thanks Lee) let me know that he tested a paid for driver that worked for him. Winchiphead signed drivers for CH340-CH341, OS X 10.9 to macOS 10.12 Pay for drivers Thanks to our old pal Björn ( original drivers post on his blog) and to that told me about it, we now have a free, working solution for CH340, CH341 on macOS 10.12 Sierra

I will update this post when I i find a solution. Using the adapterĪs mentioned here, the previously working signed driver does the same thing, so I have no free solution yet to using these serial adapters on macOS Sierra.

I then removed this and can plug a Wemos D1 Mini without my computer panicking on me. I was able to confirm it was indeed the driver by doing a cat usb.kext/Contents/ist|grep and seeing if it returns anything. Your names and locations might differ unfortunately. You will then need to find where this kext is, in my case is was under /System/Library/Extensions with the name usb.kext. In my case it was: last loaded kext at 6898626041:

This kext should be mentioned in the log you can find in /Library/Logs/DiagnosticReports with a. What you need to do is to remve the problematic kext/driver that is throwing the kernel panic. I will update this post once I have a working solution. So far, I did not find a solution to making it work, but read below for the solution to avoid getting kernel panics. CH340 CH341 serial adapters on macOS 10.12 SierraĪfter installing your new, shiny, macOS update you might have found out like me that plugging in any device that relies on a CH340/CH340G/CH341 device (like the ESP8266 based Wemos D1 Mini) immediately throws a kernel panic.

Ch341 serial driver