![]() ![]() We need to move the operating system files to the installer app directory /Applications/Install macOS High Sierra.app/Contents/SharedSupport. We’ll close the installer now (using the ⌘ + q keyboard shortcut) and move on to creating our bootable USB disk. The installer will prompt you to restart your machine once it has completed downloading. These files are what we need to create our bootable disk. In the mean time, you can access these downloaded files at the /macOS Install Data directory. You’ll have to wait for this download to finish. It will download an application called Install macOS High Sierra and launch it.Ĭontinue the steps as prompted by the installer until it starts downloading the actual operating system’s files: Then fetch the installer by going to macOS High Sierra on the App Store and pressing the Download button. Choose Mac OS Extended (Journaled) for the file system format and set the name to Untitled. To start, find a USB drive that is big enough (8 GB should work) and erase it using Disk Utility. ![]() It wasn’t immediately obvious to me how to do that, so I wrote the steps down if you’re looking to do the same. Due time for an upgrade!īecause I want to start from a clean slate and erase my entire drive, I needed a High Sierra bootable USB drive to install from. I tried to make one from BootCamp Assistant but in the latest macOS the process is different and there is nowhere the ' Create a Windows 7 or later version install. ![]() The app will format your USB device in the 'Mac OS Journaled' format and will copy all the files needed to boot from the device. The problem is that, Windows have a strange issue and I need a bootable USB to go to the recovery mode. Sierra USB is a simple app that allows you to quickly create a USB device or a bootable USB support with OS X 10.12 macOS Sierra inside. I was still running on an embarrassingly old version of Mac OS X when macOS High Sierra was released. I just install macOS High Sierra and Windows 10 through BootCamp Assistant. ![]()
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