These advanced steps are primarily for system administrators and others who are familiar with the command line. You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time.
Download macOS
Find the appropriate download link in the upgrade instructions for each macOS version:
macOS Catalina, macOS Mojave, ormacOS High Sierra
Installers for each of these macOS versions download directly to your Applications folder as an app named Install macOS Catalina, Install macOS Mojave, or Install macOS High Sierra. If the installer opens after downloading, quit it without continuing installation. Important: To get the correct installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. Enterprise administrators, please download from Apple, not a locally hosted software-update server.
OS X El Capitan
El Capitan downloads as a disk image. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. It installs an app named Install OS X El Capitan into your Applications folder. You will create the bootable installer from this app, not from the disk image or .pkg installer.
This document is for the HP Smart app on Mac. If you are using a Windows 10 computer or an Android or Apple iOS mobile device, go to Install and Use the HP Smart App (Windows 10) or Install and Use the HP Smart App (Android, iOS). Install only for me; Click Continue. (optional) If you want to change the destination for installation choose Change Install Location. (optional) If you chose Install for all users of this computer, enter the administrator credentials for the device. Click Install Software. Download this app from Microsoft Store for Windows 10. See screenshots, read the latest customer reviews, and compare ratings for App Installer.
Use the 'createinstallmedia' command in Terminal
- Connect the USB flash drive or other volume that you're using for the bootable installer. Make sure that it has at least 12GB of available storage and is formatted as Mac OS Extended.
- 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
in these commands with the name of your volume.
Catalina:*
Mojave:*
High Sierra:*
El Capitan: - Press Return after typing the command.
- When prompted, type your administrator password and press Return again. Terminal doesn't show any characters as you type your password.
- When prompted, type
Y
to confirm that you want to erase the volume, then press Return. Terminal shows the progress as the bootable installer is created. - When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Catalina. You can now quit Terminal and eject the volume.
* If your Mac is using macOS Sierra or earlier, include the --applicationpath
argument, similar to the way this argument is used in the command for El Capitan.
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Use the bootable installer
After creating the bootable installer, follow these steps to use it:
- Plug the bootable installer into a compatible Mac.
- Use Startup Manager or Startup Disk preferences to select the bootable installer as the startup disk, then start up from it. Your Mac will start up to macOS Recovery.
Learn about selecting a startup disk, including what to do if your Mac doesn't start up from it. - Choose your language, if prompted.
- A bootable installer doesn't download macOS from the Internet, but it does require the Internet to get information specific to your Mac model, such as firmware updates. If you need to connect to a Wi-Fi network, use the Wi-Fi menu in the menu bar.
- Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions.
Learn more
For more information about the createinstallmedia
command and the arguments that you can use with it, make sure that the macOS installer is in your Applications folder, then enter this path in Terminal:
Catalina:
Mojave:
High Sierra:
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El Capitan:
Learn how the Mac App Store beautifully showcases your apps and makes them even easier to find, and how Developer ID and notarization make it safer for users to install apps that you distribute yourself.
Mac App Store
The Mac App Store makes it simple for customers to discover, purchase, and download your apps, and easily keep them updated. The Mac App Store on macOS Mojave and later offers editorial content that inspires and informs. Organized around the specific things customers love to do on Mac, along with insightful stories, curated collections, and videos, the Mac App Store beautifully showcases your apps and makes them even easier to find.
Outside the Mac App Store
While the Mac App Store is the safest place for users to get software for their Mac, you may choose to distribute your Mac apps in other ways. Gatekeeper on macOS helps protect users from downloading and installing malicious software by checking for a Developer ID certificate. Make sure to test your apps with the macOS 10.15 SDK and sign your apps, plug-ins, or installer packages to let Gatekeeper know they’re safe to install.
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You can also give users even more confidence in your apps by submitting them to Apple to be notarized.
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Mac Logo
The Mac logo is designed to easily identify software products and hardware peripherals developed to run on macOS and take advantage of its advanced features.
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Mac App Store | Outside Mac App Store | |
---|---|---|
App Distribution | Hosted by Apple | Managed by developer (with Developer ID) |
Software Updates | Hosted by Apple | Managed by developer |
Worldwide Payment Processing | Managed by Apple | Managed by developer |
Volume Purchasing and Education Pricing | Managed by Apple | Managed by developer |
Advanced App Capabilities (iCloud Storage and Push Notifications) | Available | Available |
App Store Services (In-App Purchase and Game Center) | Available | Not Available |
64-Bit | Required | Recommended |
App Sandboxing | Required | Recommended |