Type or paste one of the following commands in Terminal. I just performed this with a USB 3.0 USB Stick over the weekend.11' 2013 MacBook Air (top specs, 8gd Ram, 512gb hard drive, 1. I have validated that i have enough RAM and diskspace when download happens. ' This copy of the Install macOS High Sierra.app application is damaged, and can't be used to install macOS '. Open Terminal, which is in the Utilities folder of your Applications folder. I have tried multiple times (22) to download High Sierra but every time i get message that.
Make sure that it has at least 12GB of available storage and is formatted as Mac OS Extended. Connect the USB flash drive or other volume that you're using for the bootable installer.Use the 'createinstallmedia' command in Terminal It installs an app named Install OS X El Capitan into your Applications folder. Open this file and follow the onscreen instructions. OS X El Capitan downloads as a disk image that contains a file named InstallMacOSX.pkg.It installs an app named Install macOS Sierra into your Applications folder. macOS Sierra downloads as a disk image that contains a file named InstallOS.pkg.Enterprise administrators, please download from Apple, not a locally hosted software-update server. To get the required installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6.
If the installer opens after downloading, quit it without continuing installation. macOS Catalina, macOS Mojave, and macOS High Sierra download directly to your Applications folder as an app named Install macOS Catalina, Install macOS Mojave, or Install macOS High Sierra.Find the appropriate download link in the upgrade instructions for each macOS version: