- HOW TO MAKE A USB DRIVE BOOTABLE FOR MAC OS X HOW TO
- HOW TO MAKE A USB DRIVE BOOTABLE FOR MAC OS X MAC OS X
- HOW TO MAKE A USB DRIVE BOOTABLE FOR MAC OS X INSTALL
- HOW TO MAKE A USB DRIVE BOOTABLE FOR MAC OS X CODE
To install the NetBSD boot image, we need to have a partition of type “NetBSD” = 0xa9 = 169. However, for our purposes the file system type is not the right. This will flag the partition number 1 as bootable.
HOW TO MAKE A USB DRIVE BOOTABLE FOR MAC OS X MAC OS X
But before we do this, we doĪgain to make sure Mac OS X didn’t re-mount it meanwhile (which it usually does, everytime you mess around with your drive). Now to mark the partition as bootable, we have to use fdisk in interactive mode. If you leave out “-b 512”, our stick will not be bootable. We have to give these options to fdisk, because we have also given “-b 512”, whichs sets the sector size to 512 bytes per sector (fdisk man says “block size”, but it’s really sector size). Note that the numbers given in the above example don’t matter actually. The option “-c 1024 -h 255 -s 63” specifies the “BIOS geometry” fdisk should use. If you choose to do so, you will have to append the “-f /path-to….” to every fdisk command below. If you want to use your own MBR boot loader, you have to specify an MBR template for fdisk to use via “-f /path-to-a-mbr-template-file”). This will overwrite any MBR present (-i) and create a single FAT partition (-a dos) on your drive.
This should unmount all the volumes on your flash drive. Before you start, make sure that you don’t have any volumes of your stick mounted using Instead I will to describe setting up your stick with “fdisk”. Since this tool is rather user-friendly and self-explaining, I won’t describe it here. The first way is to use the Mac OS X Disk Utility. There are at least two ways to do this under Mac OS X. The next thing you have to do, is set up the MBR and create suitable partitions on your stick. For sake of concreteness let’s assume it is bound to /dev/disk2. In command line, while the stick is mounted (i.e. The easiest way to find out which device file it assigns to, is to type If you insert a USB flash drive into your Mac, the OS will associate to it a device file /dev/disk, where n is some natural number. Creating a NetBSD installation disc on a USB flash drive USB flash drives are treated like normal hard drives, so we have to have MBR and VBR.ġ. How a BIOS boots from a CD is specified in the “El Torito”-Standard. For CDs the situation is different, but basically the same. Hence there is no MBR, and the BIOS will directly try to execute the VBR boot loader. If you are booting from a floppy, there are no partitions, just one volume.
HOW TO MAKE A USB DRIVE BOOTABLE FOR MAC OS X CODE
The MBR boot code will then give control to the executable code in the VBR, which will then start the OS. The bootable partition’s analog of the MBR is the VBR = Volume Boot Record, whose format will depend on the filesystem type of that partition. This boot manager will usually try to boot from the partition, which is flagged as bootable. ), and will start executing the boot manager code in this MBR. If this is a hard drive, it will expect that the first 512 bytes of this disk constitute a valid MBR = Master Boot Record (cf. If there is more than one bootable drive, it will choose the one with the highest priority. hard drives, floppy disks, CDs and well USB flash drives. It will look for existing bootable drives, which are e.g.
What happens when you start a typical PC, is that the BIOS will – after having gone through some testing/self-check stuff we don’t care about – try to start the OS.
HOW TO MAKE A USB DRIVE BOOTABLE FOR MAC OS X HOW TO
W E L L Y O U S U R E L Y W O U L D N ‘ T I F Y O U W A S T E D T H R E E F * * * I N G D A Y S T R Y I N G T O F I G U R E O U T H O W ! ! !Īnyway, so really how to create a bootable USB stick now, under Mac OS X ? I shall describe one way to do this, for the example of a NetBSD installation. You could argue also, that creating a blog with the sole purpose of explaining how to create a bootable usb flash drive under mac os x is rather silly, too. You probably noticed that this is a rather silly title for a posting.
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