Mac OS X Catalina Serial Monitor Problem I have some problems on MacBook Pro running with Catalina. I bought new nodemcu LoLin board. Its clone. It has ch340 adapter to communicate. And writing on bottom side wemos.cc and use ch340g driver.

I succesfully installed drivers and I can see my lolin boards on port list

I upload a code that doing only print hello to serial port. I tried with 9600 and 115200 baud rates. My serial monitor show garbage data. I am using platform io with VSCode to upload code and upload time is too much.When I am uploading code I got this warning :

"Detected crystal freq 156.04MHz is quite different to normalized freq 40MHz. Unsupported crystal in use?"

I am using cheap thundeIrbolt usb converter too. But I connect with this converter to Windows pc, everything looks fine. I can see hello world on serial monitor. But on my Mac, I can see garbage only. I tried some serial monitors, Arduino IDE and platform io ide but still same.

Are there any solution about this problem? 

EDIT :

I fixed issue last night. Catalina has ch340 drivers already and I setup oem driver from GitHub. Apples driver and oem drivers conflicting. If you use Mojave and higher os, you dont need any driver for ch340. So if you installed ch340 oem  driver you should delete it.

I am adding the post:
Platformio post
I fixed issue last night. Catalina has ch340 drivers already and I setup oem driver from GitHub. Apples driver and oem drivers conflicting. If you use Mojave and higher os, you dont need any driver for ch340. So if you installed ch340 oem driver you should delete it.
I am adding the post: Platformio post