Boot the device that you want from the USB stick. Run diskutil eject /dev/diskN and remove your flash media when the command completes.Start the 'Disk Utility.app' and unmount (don't eject) the drive. Note: If you see the error dd: /dev/diskN: Resource busy, make sure the disk is not in use. Use the same command but replace bs=1m with bs=1M. Note: If you see the error dd: Invalid number '1m', you are using GNU dd. Note: Using /dev/rdisk instead of /dev/disk may be faster. Execute sudo dd if=/path/to/downloaded.img of=/dev/rdiskN bs=1m (replace /path/to/downloaded.img with the path where the image file is located for example.Run diskutil unmountDisk /dev/diskN (replace N with the disk number from the last command - in the previous example, N would be 2).Run diskutil list again and determine the device node assigned to your flash media (e.g.Run diskutil list to get the current list of devices.dmg ending on the output file automatically. Hdiutil convert -format UDRW -o /path/to/target.img /path/to/source.iso Open the Terminal (in /Applications/Utilities/ or query Terminal in Spotlight).Tip: Drag and Drop a file from Finder to Terminal to 'paste' the full path without typing and risking typos. 22 mins Last Updated Here’s the Deal Slant is powered by a community that helps you make informed decisions. img file that you will be required to create from the. 5 Best boot loaders/managers as of 2023 - Slant Linux OSX Dual Boot multi platform Boot Managers Bootloader Multi-Boot What are the best boot loaders/managers 9 Options Considered 575 User Recs.

This is it, you have a bootable OS X usb drive.This quick step by step will show you how to make a bootable USB stick from a downloaded ISO image file using an Apple Mac OS X.

From the first iso, obtained on step 3, copy BaseSystem.chunklist and BaseSystem.dmg on the thumb drive (actually, the latter might not be necessary - but it worked for me at this step and I stopped experimenting). Mount the thumb drive (you might need to apt-get install hfsprogs to mount an HFS filesystem). In my case (High Sierra 10.13.6), 4Gb stick was sufficient, even though createinstallmedia requires 8Gb. iso as well ( dmg2iso -i BaseSystem.dmg -o BaseSystem.iso)Ĭopy it to a thumb drive: dd if=BaseSystem.iso of=/dev/sdX BS=1M. iso įind BaseSystem.dmg in the mounted image. You can do it from GUI (right click, 'Open with disk image mounter') or something like mount -o loop. So, you'll need to find an alternative source.Ĭonvert. This question on apple support has all the links, but they are only accessible from OS X (if you had access to a live OS X at this point - you probably would've just used createinstallmedia already, right?). Unlike El Capitan, High Sierra only needs BaseSystem.dmg, which also has enough free space to boot - so, the process overall can be simplified a bit. So, leaving it here in case somebody else will need to. I recently had to make a High Sierra 10.13.6 bootable USB drive, and the process turned out a bit more involved that just dd-ing the dmg2img-generated ISO to a thumb drive.

Boot maker for mac