Part 2: Create Mac OS X Bootable USB Installer from DMG. Once it is done restoring the iso open up Gparted and select your usb-drive.UPDATE 09/2017: Create a Bootable macOS High Sierra Install Drive with DiskMaker X 7Complex and take more time. Open Disks AKA Gnome-Disk-Disk-Utility and drag base.iso to it and hit start restoring.This will take a wile. Then run dmg2img BaseSystem.dmg base.iso it will convert the the dmg file to iso file named base.iso. Adb pull source destination Once you.cd Desktop. Open the downloaded dmg file and drag adbLink.It should be noted that DiskMaker X erases the volume or the drive you chose, according to the options you chose. All you need is an 8 GB (minimum) USB thumb drive, a USB, FireWire, or Thunderbolt drive or an SD-Card the OS X 10.11 El Capitan Installer from the App Store (once the download is complete the installer file will appear in the Applications folder — do not move it) and the DiskMaker X installer. Luckily, DiskMaker X helps fill the void by allowing you to make a bootable OS X 10.11 El Capitan USB install drive, making a task such as installing on several different machines easier.Like the previous versions, DiskMaker X is free of charge (however, donations are accepted). And as with previous OS X versions dating back to OS X 10.7, El Capitan is only available for install via download from the App Store.So if you previously relied on DVD installs, you won’t be able to do so with this version.For this example, click the button that says “An 8 GB USB thumb drive”.6.) DiskMaker X will find the available thumb drives connected to your Mac. Click “Use this copy”.5.) Next you will be asked which kind of disk you want to use for your bootable installer. Click the button that says “El Capitan (10.11)”.4.) By default, DiskMaker X should find the OS X installer file you downloaded earlier. When finished, right-click in the disk image window and choose Eject Disk.2.) Connect your USB thumb drive to your Mac, then launch the DiskMaker X application from your Applications folder.3.) A small window will appear asking you to choose from three versions of OS X, in order to create the boot disk. The application will only take a second or two to be copied into the folder (it’s a small file).Click Continue.8.) Initially you will not see any windows for several seconds, then the administrator password dialog will appear. DiskMaker X will remind you that administrator privileges are required. If you are OK with this click “Erase then create the disk”.
Drag Dmg File To Usb Mac OS X BootableIf you appreciate the function or functionality this software offers, we encourage you to support the authors.I’m here to share a tip for those who create a OS X installer on a USB stick but can’t get it to boot: Most guides mention the Terminal Window method of creating a bootable copy of the Mac OS installer, and the older OS guides mention using Disk Utility to do the same task. From that point you can follow the standard OS X prompts as they appear.)Learn more: Check out more OS X El Capitan coverage from the Rocket Yard here.Note: OWC has no affiliation with this software and receives no benefit related to this support (other than a benefit we all share in the continued support of these applications). You can close this if you do not wish to begin the install process right away.10.) Finally a dialog will pop up telling you that your boot disk is ready, giving you further options to quit, open the startup disk preferences so you can begin the OS X install process, and an option to make a donation.(Within the Startup Disk preferences, once you set the new bootable installer disk to be the active boot drive, you can click the Restart… button and the OS X installation process will begin. In our test, Step 8 took ~ 32 minutes.9.) When the process is finished, a window should open displaying the contents of the new bootable drive. Because the application sets up more than 6GB of installer data via a USB connection (most thumb drives use USB 2 which has a maximum data rate of ~ 50MB/s), this process will take a while. If the USB key does not support this feature it may not work as a boot-up volume. Following such guides will allow for what should boot but that’s not always the case.After much searching, I found out why even Apple’s own officially supported method is, at best, hit-or-miss: The “missing step” had to do with making the USB stick bootable (a permissions issue).My non-booting USB El Capitan installer began to work after I right clicked it on the desktop, selected “Get Info”, unlocked the padlock icon on the lower right (enter admin pass) and then UNCHECKED the box for “ignore ownership”. (The reason why people find it easier to use Diskmaker X is because it’s doing that step for you.)Apple’s officially supported method is to use the Terminal Window and a “create media” command line. Do a “get info” (depending on type of mouse you might be able to right-click it). Mount your non-booting flash drive to the desktop. The solution is very straightforward but for some reason these guides almost universally leave out this step.To give credit where credit is due, here is the source (a better version of Apple’s officially supported method because it includes the step on how to make a USB stick bootable, which may not be by default the case):You may need to perform an extra step to make the USB stick bootable. Now click the padlock closed to save the changes. Uncheck the box that says “ignore ownership” (if you do not see this box you may have a USB flash drive that does not support “ownership” settings and so you will need to obtain one). Now look on the bottom left. Unlock the padlock (this requires your admin password). The default setting on my USB flash drive was to disable the USB stick from booting up. Then I stumbled across one lone how-to guide that mentioned the issue of USB flash drive ownership (must be a supported feature). (Also bear in mind that older Mac OS X has a different method of making a USB flash drive bootable involving the use of Disk Utility rather than the Terminal Window “create media” command line that is used for newer incarnations for Mac OS X.)I went for a whopping TWO YEARS without managing to figure out how to make a USB boot, even though by all appearances I had followed directions like this successfully (all the files were there). If the Mac OS X installer isn’t one of the boot options, zap the PRAM and try again.If it still doesn’t work, verify that you have created the OS X installer in the same — or as recent of a version — of OS X as you intend to create on the USB flash drive. Add drop down in excel for macThis “missing step” may be what is needed to make the USB stick bootable.
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