In addition, I also used the same steps to try to create a bootable installation drive using a 500 GB hard drive, but it doesn't appear upon option/startup either.Ĭreate a High Sierra Bootable USB Install Disk w/ Mojave I am trying to do a clean install of High Sierra on my MacBook Air (which has crashed) by creating a Bootable Install Disk with my iMac which is running Mojave V 10.14.5 I would have thought that the process of creating a bootable drive would add a set of system and user folders to the drive as well. In either case, the drive does not show up when I restart and hold down the Option key, nor does it show up in System Preferences/Startup Disk.Īfter creating the bootable drive, the only file on the drive is "Install macOS Mojave." This file appears to be identical (exact same # of bytes) as the "Install macOS Mojave" app that I downloaded from Apple into my Applications folder, in other words, the process appears to have simply copied the installer. I created the drive in two ways, using the terminal commands given here, as well as by using the "Install Disk Creator" software package. I formatted the 16 GB drive using Mac Extended (Journaled) with a GUID partition. I am trying to make a bootable USB drive installer for Mojave.
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