I downloaded the debian amd 64-bit iso file (apx 650 mb) on a macbook w/retina (i.e. no cd drive) running OS X. I'm trying to dual boot and have already gotten rEFInd working. Set up partition for Debian with MS-DOS(FAT) format and blessed it. Now I'm trying to burn the .iso onto a usb to use for installation on the same computer. I'm using Terminal to convert .iso to .img with:
hdiutil convert -format UDRW -o ./debian-7.8.0-amd64-CD-1\ \(1\).img ./debian-7.8.0-amd64-CD-1\ \(1\).iso
but it keeps outputting
hdiutil: convert failed - No such file or directory
Not sure what I'm doing wrong.
EDIT: I've succeeded in converting the .iso to .img and I'm attempting to unmount the disk partition I've made for debian via
diskutil unmountDisk /dev/disk0s5 but I keep getting
Unmount of disk0 failed: at least one volume could not be unmounted. I've verified this is the right disk using
diskutil list. Any ideas what is wrong?