![]() Insert the USB drive into the Mac being installed.ĬAUTION: Again, this wipes out the hard disk on the Mac. ![]() Select your flash drive from the drop-down menu.This is should be located in your root Applications folder under Macintosh HD (not your user Applications folder). Click the “Choose a macOS installer” button.Within the Applications folder, double-click to invoke “Install Disk Creator”. Delete the zip file downloaded to free up space.Drag and drop the app file into the Applications folder.Open a new Finder Window and Go Applications.Click Open if you see a pop-up about downloading from the internet.Scroll to the “Install Disk Creator” application file (dated March 15, 2017).Unzip the file by clicking on it in the browser or in Finder.Click the Download icon on the website.PROTIP: Drag Terminal.app to drop it at the bottom edge of the screen Open the Terminal app (in the Utilities folder of your Applications folder). If it has at least 12 GB of available disk space for installation files. Optionally, a secondary internal partition can be used ![]() If you have any other data on that flash drive, back it up,īecause the installer will delete everything on it. PROTIP: Use the GUI utility described below instead of the Run the installer: "sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/startosinstall -converttoapfs NO" PROTIP: The forward slash is used as an escape character before each space character. This means back slash (\) escape charactersĪre needed to “escape” spaces in typed commands referencing the file.Įxample: ls "/Applications/Install\ macOS\ Sierra.app/Contents/Resources/" Notice there are spaces within the file name of the download The file “Install macOS Sierra.app” for 10.12.5 is 4.97 GB. In Finder, press shift command A or click the Go menu to select Applications.
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