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Find the appropriate download link in the upgrade instructions for each macOS version:., and 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.To get the required installer, download from a Mac that is using, or El Capitan 10.11.6. Enterprise administrators, please download from Apple, not a locally hosted software-update server. downloads as a disk image that contains a file named InstallOS.pkg. Open this file and follow the onscreen instructions. It installs an app named Install macOS Sierra into your Applications folder. downloads as a disk image that contains a file named InstallMacOSX.pkg.
Open this file and follow the onscreen instructions. It installs an app named Install OS X El Capitan into your Applications folder. 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. 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. After, follow these steps to use it:.
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Sep 14, 2015 Step 3: Highlight the volume you want to use by using your mouse or trackpad, or left and right arrow keys on the keyboard. Step 4: Double-click or press the Return key to boot your Mac from the selected volume. Tip: If there are several USB storage devices connected to your Mac, Startup Manager will only list the ones containing bootable volumes.
Plug the bootable installer into a. 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.Learn about, including what to do. 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.
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