Link for Katana Mk2 v2.0 firmware download:
https://www.boss.info/global/support/...

Cable for updating:
https://www.amazon.com/AmazonBasics-U...

If you need a USB Hub because your new Mac only has USB C type port, we recommend this USB Hub:
https://www.amazon.com/TOTU-Ethernet-...

Find out info on Katana Mk2 100 below:
https://www.boss.info/global/products...