Mac os high sierra download iso bootable

Use the 'createinstallmedia' command in Terminal After downloading the installer, connect the USB flash drive or other volume you're using for the bootable installer. Open Terminal, which is in the Utilities folder of your Applications folder. Type or paste one of the following commands in Terminal.

These assume that the installer is still in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using. If it has a different name, replace MyVolume accordingly. When prompted, type your administrator password and press Return again. And you will see three options on the main screen. At this time, click 'Burn' tab And you will be lead to a new window.

If the drive name was wrong, you can click 'Change' button to pick up the right device. Next, click 'Browse' button to add the. Step 4 : When the dmg file is loaded from local hard drive, click 'Burn' button to start burning dmg to USB drive.

This process will be finished in less than 10 minutes and you have to wait before you can do anything with the device. You will be notified when the burning task is completed. Still, it's an effective way to create bootable media for a Mac computer. Here's how it works:. Since you're converting the file twice, there's a chance that the file could get corrupted in the process. If that happens repeatedly, then try this next method.

After the volume is erased, you may see an alert that Terminal would like to access files on a removable volume. Click OK to allow the copy to proceed. When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Monterey. You can now quit Terminal and eject the volume. Use the bootable installer Determine whether you're using a Mac with Apple silicon , then follow the appropriate steps:. Apple silicon Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.

Turn on your Mac and continue to hold the power button until you see the startup options window, which shows your bootable volumes. Select the volume containing the bootable installer, then click Continue. When the macOS installer opens, follow the onscreen instructions.

Intel processor Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing. Where do I go from there to install the macOS? Tyler, thank you for your timely response. I am using a macOS host, not a Windows host. Are there any additional preparations to do on the hosting Mac? Got it to work! It was me. Thank you for the excellent guide and top notch response time. I am using this in a VirtualBox in ubuntu.

What if any commands do I need to run for this to work? To fix, I double clicked the InstallSystem. Proceeded without further errors. How can we fix this? Thank you for your response! Indeed, with updates, the installer will not fit in a m image. Keeping it slim, m is appropriate. I needed this size change too. Worked really well otherwise.

Any chance of updating the original script to the new values that seem to be required. Thanks for the post though. Every release this process seems to change a bit.