Paste that entire command line from below at the Terminal's prompt: Choose the appropriate command line (begins with "sudo") depending upon what OS X installer you want. Open the Terminal in the Utilities' folder. Click on the Apply button and wait for the Done button to activate.Set the Format type to Mac OS Extended (Journaled.) In the drop down panel set the partition scheme to GUID.Click on the Erase button in the Disk Utility toolbar. After Disk Utility loads select the drive (out-dented entry with the w/type and size info) from the side list.Open Disk Utility in the Utilities' folder.You will need an 8GB or larger USB flash drive that has been partitioned and formatted for use with OS X as well as an installer for the desired macOS version that you have previously downloaded from the App Store. Simply use the Terminal command by copying and pasting the command line for the version of macOS from the list below. Second, read this How To outline for creating a bootable macOS installer. Here is how to make bootable installers, but you will need a functioning Mac and a copy of the desired installer.īootable USB Installers for OS X Mavericks, Yosemite, El Capitan, and Sierraįirst, review this introductory article: Create a bootable installer for macOS. If your computer has no OS installed, then you cannot run an installer.
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