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I didn't convert the ISO to img, I just formatted a USB drive for FAT and used dd:

sudo diskutil unmountdisk /dev/disk1
sudo dd if=./debian.iso of=/dev/disk1 bs=1m

I tested this with Debian 9.

It's important to note that the appropriate /dev/disk# should be determined by using the following command on the macOS command line:

diskutil list

In the question above, the USB device mapped to /dev/disk2 whereas the example above uses /dev/disk1. But the number could be 3 or 4 or some other number. Ensure the number correlates with the memory stick you use; you risk losing data if you get it wrong.

I didn't convert the ISO to img, I just formatted a USB drive for FAT and used dd:

sudo diskutil unmountdisk /dev/disk1
sudo dd if=./debian.iso of=/dev/disk1 bs=1m status=progress

I tested this with Debian 9.

It's important to note that the appropriate /dev/disk# should be determined by using the following command on the macOS command line:

diskutil list

In the question above, the USB device mapped to /dev/disk2 whereas the example above uses /dev/disk1. But the number could be 3 or 4 or some other number. Ensure the number correlates with the memory stick you use; you risk losing data if you get it wrong.

I didn't convert iso to img, and just format usb drive for FAT and use dd

sudo diskutil unmountdisk /dev/disk1
sudo dd if=./debian.iso of=/dev/disk1 bs=1m

tested with debian 9 version

Note. It's important to note the /dev/disk# should be found by using the following command on the osX command line:

$diskutil list

In op's question, they found the USB corresponded with /dev/disk2 whereas this example uses /dev/disk1. But the number could be 3 or 4 or some other number. Ensure the number correlates with the memory stick you use, or else you can seriously lose or corrupt some data.

I didn't convert the ISO to img, I just formatted a USB drive for FAT and used dd:

sudo diskutil unmountdisk /dev/disk1
sudo dd if=./debian.iso of=/dev/disk1 bs=1m

I tested this with Debian 9.

It's important to note that the appropriate /dev/disk# should be determined by using the following command on the macOS command line:

diskutil list

In the question above, the USB device mapped to /dev/disk2 whereas the example above uses /dev/disk1. But the number could be 3 or 4 or some other number. Ensure the number correlates with the memory stick you use; you risk losing data if you get it wrong.

I didn't convert iso to img, and just format usb drive for FAT and use dd

sudo diskutil unmountdisk /dev/disk1
sudo dd if=./debian.iso of=/dev/disk1 bs=1m

tested with debian 9 version

I didn't convert iso to img, and just format usb drive for FAT and use dd

sudo diskutil unmountdisk /dev/disk1
sudo dd if=./debian.iso of=/dev/disk1 bs=1m

tested with debian 9 version

Note. It's important to note the /dev/disk# should be found by using the following command on the osX command line:

$diskutil list

In op's question, they found the USB corresponded with /dev/disk2 whereas this example uses /dev/disk1. But the number could be 3 or 4 or some other number. Ensure the number correlates with the memory stick you use, or else you can seriously lose or corrupt some data.