How do I change config of the USB image?

[Jay Viper]

As above. I created the USB innate using dd on my Mac. I mounted the EFI
partition but didn't see anything there. Perhaps I need to mount the main
partition on Linux?

Another question please. How do I change the default boot volume/.EFI file?

Thanks

[Jay Viper]

I would like to add that I want to make the default boot a Windows 10 installation. Thanks again

[Roderick W. Smith]

You should be able to mount the USB drive and edit the EFI/BOOT/refind.conf file on that drive; however, note that the partition type of the one partition on the image file is for an ESP. Many OSes, including macOS, hide ESPs by default. Thus, you'll have to mount it with an explicit text-mode mount command. Something like step #2 of the manual rEFInd macOS installation instructions should do the trick, but you'll need to adjust the partition identifier, since it will almost certainly not be /dev/disk0s1. It might be /dev/disk1s1 or something else.

[Jay Viper]

thank you