I recently installed this "CH341 Driver" so that I could connect my new chinese Arduino.

But when I plug the USB cable, connected to the Arduino, into my computer it crashes immediately. A few moments later a message pops up that tells me that, because of a problem, the computer had to restart.

Now I want to delete this installed driver and download another driver or another version of it. But in order to do so I need to delete the old software (which makes my computer crash).

I looked around on the internet about how to do so, but most of the googled suggestions tell me that I can simply remove it from the "Applications" folder. It isn't a program so that won't help. I also found a few results that tell me to open terminal, enter the command "pkgutil --pkgs", search for the package and enter the command "sudo pkgutil --forget the-package-name.pkg".

But I can't find the package name in the list. So I went to "About this Mac" -> "System Report..." -> "Software" -> "Installations" and there I can see the names of the packages, but unfortunately I can't remove them from there.

So is there anybody who can tell me where I can remove them?

2 Answers 2


You can check what was installed and remove it manually. Copy the *.pkg file to some empty tmp folder. Then:

xar -xf YOUPACKAGE.pkg

Then print the content of the Bom file with:

 lsbom $(find . -name Bom)

You'll have the list of files like: (Here's the part for Cisco AnyConnect)

./opt/cisco/vpn 40755   0/0
./opt/cisco/vpn/bin 40755   0/0

All file path start with . but they are installed relative to the root folder (/). In my example I have to remove /opt/cisco folder.

  • You could also use Pacifist to visually show you the contents of package and receipt files, and scan for receipt files for particular applications... though unfortunately it has no uninstall capability, which I always thought would be useful.
    – calum_b
    Dec 8, 2016 at 12:20
  • Just an fyi... The output of my lsbom command seemed to reference ~/Library. Not sure why - I was trying to uninstall the Skype Web Plugin on OSX 10.11.6
    – nate
    Jul 20, 2017 at 18:42

I removed the .pkg file from its installation path /Library/Extensions/usbserial.kext.

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