How to write a USB stick with Windows. How to boot a Mac from USB media. Getting your Mac to load from a USB drive is fairly straightforward. When you choose to enter BIOS Setup, the setup utility page will appear. Windows and Linux users might consider Acronis Disk Director 12.
You can use a USB drive or an SD card instead of a CD or DVD to create bootable media for installing Red Hat Enterprise Linux on 64-bit AMD, Intel, or ARM systems. The exact procedure varies depending on whether you want to perform it on a Linux or Windows system. You can create minimal boot media and full installation media using the same procedure; the only limitation is the capacity of the USB drive - it must have enough space to fit the entire image, which means roughly 450 MB for minimal boot media and 4.8 GB for full installation media.
Connect a USB flash drive to the system and identify the device path with the diskutil list command. The device path has the format of /dev/disk number, where number is the number of the disk.
The disks are numbered starting at zero (0). Disk 0 is likely to be the OS X recovery disk, and Disk 1 is likely to be your main OS X installation. In the following example, it is disk2: $ diskutil list /dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: GUIDpartitionscheme.500.3 GB disk0 1: EFI EFI 209.7 MB disk0s1 2: AppleCoreStorage 400.0 GB disk0s2 3: AppleBoot Recovery HD 650.0 MB disk0s3 4: AppleCoreStorage 98.8 GB disk0s4 5: AppleBoot Recovery HD 650.0 MB disk0s5 /dev/disk1 #: TYPE NAME SIZE IDENTIFIER 0: AppleHFS YosemiteHD.399.6 GB disk1 Logical Volume on disk0s1 8A1-48DF-9FC5-84506DFBB7B2 Unlocked Encrypted /dev/disk2 #: TYPE NAME SIZE IDENTIFIER 0: FDiskpartitionscheme.8.0 GB disk2 1: WindowsNTFS SanDisk USB 8.0 GB disk2s1.