So I tried Mac OS Extended and Extended FAT, but that didn’t help either.Īs mentioned by a couple of the comments on that page, I tried writing to disk2 instead of disk2s1 (keep in mind that the USB key on your system may be a different disk - use diskutil list to help identify it): The server never recognized the USB stick as valid media.Īt first, I thought it might have had to do with the formatting of the USB stick, which was FAT32. I downloaded the minimal ISO and proceeded to follow the instructions at How to Copy an ISO to a USB Drive from Mac OS X with dd, but it never worked. I’m running Mac OS Sierra and I needed to make a bootable CentOS 7 USB stick.
