Sorry but my understanding is that Tbouska ment it to change it with the extra "r"
Further the command is accepted but it seems that in catalina it is now not permitting it any more.
This is why libereelec USB-CD creator is not working on a mac and the error: Couldn't open /dev/disk2 is shown.
I believe it is some kind of permission issue with the creator program as when it runs it seems to run as root and hence the documents/desktop/icloud folders don't work properly. I just ran through all of the terminal commands on my Macbook with Catalina without issue.