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. To download macOS

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.

How to make bootable high sierra usb

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. Try MacKeeper now! It makes sense to create a bootable USB flash drive to install the High Sierra operating system if you want to quickly install it on several Macs without having to download the installer each time. Creating a bootable drive with a High Sierra installer is quite simple. Basically, all you need is:. Well, your Mac might get slow due to system junk and other unneeded files. Therefore, you have to delete all this junk before backing up your data. One of the easiest ways to clean your Mac is to use an app such as MacKeeper that will easily and quickly delete all useless and duplicated files while keeping the useful stuff intact. The drive needs to be blank. Therefore, Time Machine will ask for your permission to reformat your external hard drive. For a more detailed guide, check out our article on how to back up your Mac using Time Machine. Get an external drive you want to save the installer on.

Start your computer with the bootable installer.

To start the conversation again, simply ask a new question. I'm currently running Mojave I asked for assistance on the iDVD community, and a couple of very helpful people gave me various suggestions, one of which was to install High Sierra the last OS with which iDVD was totally compatible on a flash drive, and run iMovie and iDVD from it. However, I haven't been able to complete the installation. I downloaded the High Sierra installer, but when I open it, I get this message:.

You can use an external drive or secondary volume as a startup disk from which to install the Mac operating system. These advanced steps are primarily for system administrators and other experienced users who are familiar with entering commands in Terminal. You don't need a bootable installer to upgrade macOS or reinstall macOS , but it can be useful if you want to install macOS on multiple computers without downloading the installer each time, or you're unable to install a compatible macOS from the Finder or macOS Recovery. Your Mac must also be compatible with the macOS that you're downloading. Enterprise administrators: download from Apple, not a locally hosted update server.

How to make bootable high sierra usb

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?

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Connect your external hard drive 2. October 19, at am. After the volume is erased, you may see an alert that Terminal would like to access files on a removable volume. David says:. Note the way the USB needs to be formatted. Shop on Amazon. Click OK to allow the copy to proceed. 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. Alex says:. Latest Updated on Wednesday, January 10, Anonymous says:. Click Continue. Ravi says:. User profile for user: dialabrain dialabrain.

Please note that before installing any system, you need to ensure there is sufficient space on your Mac.

Any suggestions to get the boot installer setup on the USB? User level: Level 1. Randy says:. Once is quite enough! Michael says:. Get started with your Apple ID. You can use an external drive or secondary volume as a startup disk from which to install the Mac operating system. The drive gets formatted upon running the command to create the High Sierra installer. If you can create this, boot from it and see if you can install HS onto your external drive. Right-click on TransMac and select "Run as administrator. If the thumb drive's attached there, there's no was to connect it to the computer to use the keyboard and screen to direct the installation. When the installation starts the files will be disposed of, so you need to step in beforehand! What is the best way to do this?