How to Download and Install macOS High Sierra on Your Mac
macOS High Sierra is the fourteenth major release of macOS, Apple's desktop operating system for Mac computers. It was released in September 2017 and introduced new features such as Apple File System (APFS), Metal 2, Safari 11, and HEVC video encoding. If you want to upgrade your Mac to macOS High Sierra or reinstall it from scratch, you need to download the installer from the App Store or create a bootable installer on a USB flash drive. In this article, we will show you how to do both.
Download macOS High Sierra Installer from the App Store
The easiest way to get the macOS High Sierra installer is to download it from the App Store on your Mac. To do this, follow these steps:
Make sure your Mac is compatible with macOS High Sierra. You can check the list of compatible models here: https://support.apple.com/en-us/HT211683.
Make sure your Mac is running the latest version of OS X El Capitan, macOS Sierra, or any later version of macOS.
Back up your Mac using Time Machine or another backup method.
Open the App Store app on your Mac and search for \"macOS High Sierra\" or click this link: https://apps.apple.com/us/app/macos-high-sierra/id1246284741mt=12.
Click the Get button to begin downloading the macOS High Sierra installer. The installer is about 5 GB in size and will be saved in your Applications folder.
After the download is complete, the installer will open automatically. Follow the onscreen instructions to install macOS High Sierra on your Mac.
Create a Bootable Installer for macOS High Sierra on a USB Flash Drive
If you want to install macOS High Sierra on multiple computers without downloading the installer each time, or if you have trouble installing it from the App Store, you can create a bootable installer on a USB flash drive. To do this, you need an external drive or secondary volume with at least 14 GB of available storage, formatted as Mac OS Extended. You also need to download the full installer from the App Store as described above. Then follow these steps:
Plug in the USB flash drive or other volume that you're using for the bootable installer.
Open Terminal, which is in the Utilities folder of your Applications folder.
Type or paste the following command into Terminal, then press Return to enter it. This command assumes that the installer is in your Applications folder and MyVolume is the name of your USB flash drive or other volume. If they have different names, replace them accordingly.sudo /Applications/Install\\ macOS\\ High\\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
When prompted, type your administrator password. Terminal doesn't show any characters as you type. Then press Return.
When prompted, type Y to confirm that you want to erase the volume, then press Return. Terminal shows the progress as the volume is erased.
After the volume is erased, Terminal will copy the installer files to it. This may take some time depending on your internet speed and drive performance.
When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS High Sierra. You can now quit Terminal and eject the volume.
To use the bootable installer, plug it into a compatible Mac and hold down the Option key while you turn on or restart your Mac. Then select Install macOS High Sierra from the list of startup disks and follow the onscreen instructions. aa16f39245