With macOS Sierra, El Capitan, Yosemite, or Mavericks, you can use a USB flash drive or other removable media as a startup disk from which to install the Windows/Linux operating system.
These advanced steps are intended primarly for system administrators and others who are familiar with the command line.
- Download the ISO you want to use
- Open Terminal (in /Applications/Utilities)
- Convert .iso to .img using hdiutil:
hdiutil convert -format UDRW -o /path/to/target.img /path/to/source.iso
Rename if OS X gave it a .dmg ending:
mv /path/to/target.img.dmg path/to/target.img
Type diskutil list to get a list of currently connected devices
Insert USB drive you want to use
Run diskutil list again to see what your USB stick gets assigned eg – /dev/disk3
Run diskutil unmountDisk /dev/diskN (where N is the number assigned to your USB stick, in previous example it would be
Run sudo dd if=/path/to/target.img of=/dev/diskN bs=1m (if you get an error, replace bs=1m with bs=1M
Run diskutil eject /dev/diskN and remove your USB stick
The USB stick will now be ready to use
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