Usbutil For - Mac Exclusive
When the PS2 was released, external USB hard drives were not a standard gaming medium. However, the homebrew community developed OPL, which allows the PS2 to read games from a USB drive. The catch? The PS2 formats drives differently than a standard PC, and game files (ISOs) need to be organized in a specific way.
If you prefer the original USBUtil interface, you can run the Windows .exe on macOS using these tools: usbutil for mac