On Linux Mint you simply right click on the iso image and select "flash to usb". Done that a dozen times, never had any problems. Now I was disappointed to see no such option on Zorin.
No probs I thought, I ran the following command:
dd bs=4M if=ubuntu-22.04-desktop-amd64.iso of=/dev/sdb conv=fdatasync status=progress
That has worked on Debian every time. Now it goes until the end and then just hangs. No way to quit, I have to close the terminal, then no way to nicely eject the usb drive, so have to use brute force. Decided to try if the drive worked anyhow, no it didn't, got some weird errors "invalid magick number - you need to load the kernel first".
Well, had to boot a second computer to Mint and try to flash it from there, hoping I'd have everything working on Zorin but so far it seems I've had simply too many problems with Zorin that I never had with Mint, Ubuntu or Debian.
Still, this OS looks wicked!