Preparing SanDisk USB Flash Drive 128 GB for installing Kali Live not possible

Hello,

On my MacBook Pro I tried to prepare a SanDisk Ultra Dual Drive USB Type-C with 128 GB to boot Kali Linux Live 2020.2 from it. I used the existing documentation on kali.org for it. When using the dd command in a terminal I get an numeric error message related to the dd and bs parameter. The usb disk size seems too big for executing the dd command successfully. What is going wrong?
Can someone give me a help to solve this issue?
Thanks
Rally