How to make bootable high sierra usb

Please note that your Mac can't boot from a USB containing a macOS version older than the one the computer shipped with. So ensure the bootable installer you want to create is compatible with your Mac model before getting started. Its data will be erased when making the bootable installer, so ensure the essential files are all backed up.

A bootable install volume of macOS Making a USB install drive requires the usage of precise syntax at the command line with superuser privileges, using the wrong syntax could lead to unintended data loss. If the file size of the High Sierra installer is not over 5GB then you have the incomplete installer and will need to download the complete macOS High Sierra installer application as described here in order to create a bootable installer drive. Select the High Sierra installer at this screen. If you had previously created a boot installer for the High Sierra beta you may notice the syntax is different for createinstallmedia is different with the final version, part of that is to accommodate the new file name of the application installer, and the remainder removes the necessity of the —applicationpath flag and directive. Do you know of another approach to making a macOS High Sierra bootable install drive? Do you have an easier method, or do you have any particular tricks related to this process?

How to make bootable high sierra usb

It has since been updated with appropriate instructions for the public macOS High Sierra release. If it is elsewhere on your computer, move it to the Applications folder. This tutorial will be marginally easier if you leave the file name as the default: Install macOS High Sierra. This will wipe all data from the drive. This will make the guide marginally easier. Make sure there are no other volumes mounted with the same name. The USB drive will be unmounted throughout the process and will disappear from the desktop. Terminal will provide a readout of the progress; be patient! Once the files have been copied and the USB drive has been made bootable, the drive will reappear on the desktop and Terminal will inform you that the process is complete. The computer will boot from the USB drive and take you to the install screen. From there, you can now deploy High Sierra as you see fit. Starting up your Mac directly from the USB installer also lets you reformat or reparation the startup drive or other storage device, or access other built-in tools by choosing them from the menus.

A window will pop up asking if you want this disk to be your backup destination 6. Daniele says:. From what's been said, it sounds like putting the installer on a thumb drive, which would be connected to the drive.

You can also use your bootable installer to install macOS on a separate volume of your hard drive or on a partition if you are running an older version of the Mac OS. Once is quite enough! Luckily, making a bootable installation of the Mac operating system became a whole lot easier when Apple launched OS X Mavericks back in If you want to run macOS on an external drive , which is slightly different, we have a separate article. We recommend a Flash memory stick, rather than a standard hard drive, as it will be quicker. If you have an M1 Mac you might actually be better off with a Thunderbolt drive because there have been some issues with using USB drives with the M1 Mac. Note: If you have data on the drive that you plan to use you will need to transfer it to another drive, or get a new drive, as it will be completely formatted and erased.

Not only will this walkthrough work for the macOS High Sierra beta, but it will also work for the final public release once available. A note about flash drives: You will need a USB flash drive to make this work. There are many USB 3. Keep in mind that the following tutorial will purge everything on the drive, so make sure you back up any important data before proceeding. Subscribe to our YouTube channel for more macOS how-tos. Step 7: Drag createinstallmedia into the Terminal window from the Finder location opened in Step 4. Step Type --applicationpath in the Terminal window followed by a space. Step The install process will commence by erasing the contents of your USB drive and copying the installer files to the drive.

How to make bootable high sierra usb

Maybe you've got multiple Macs and a limited amount of bandwidth, and don't want to download the entire operating system for every system. Or maybe you're looking to install the operating system from scratch. To begin, you need the installer for whatever version of macOS you want on a thumb drive. Head to the Mac App Store. If what you're looking for is the latest version of macOS, search for that operating system and click the "Download" or "Install" button. The download will take a while, so make sure your Mac is plugged in and has a consistent connection to the Internet.

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Click Continue. If you want to run macOS on an external drive , which is slightly different, we have a separate article. Help us improve how you interact with our website by accepting the use of cookies. Please note that your Mac can't boot from a USB containing a macOS version older than the one the computer shipped with. Download a macOS installer using the App Store or your browser. When the restore process is complete, you'll get a message saying "Restore Complete. KewlWM says:. Cookies are small text files that help the website load faster. For information about the createinstallmedia command and the arguments you can use with it, make sure that the macOS installer is in your Applications folder, then enter the appropriate path in Terminal:. Use your Mac to the fullest!

Please note that before installing any system, you need to ensure there is sufficient space on your Mac. MacKeeper allows you to free up necessary gigabytes easily. The app will help you delete junk, duplicates, and unnecessary apps in a couple of clicks.

Page content loaded. Open TransMac as an administrator if you've closed it. Can you help me create a new bootable drive so I can get any macOS operating on it again, please!?? Therefore, Time Machine will ask for your permission to reformat your external hard drive. Each command assumes that the installer is in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using. David says:. Choose the volume you wish to install the new macOS on and click Erase 3. User level: Level 6. Do you have to re-download from App Store? It should look like this. You should receive a warning that your drive will be erased. Help us improve how you interact with our website by accepting the use of cookies. If that's the case, run data recovery from Recovery Mode to get back your files first before proceeding.