You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time. These advanced steps are primarily for system administrators and others who are familiar with the command line. Therefore, click on the download link in order to start installation process of macOS Hgh Sierra ISO File. Because the ISO File is 5GB and hard to download it. Download macOS High Sierra 10.13 ISO Virtual Machine Images Now download macOS High Sierra ISO File but you need to have reliable internet connection. Configure the following settings for installing Mac OS X guest on Mac OS hosts. Run: sudo./create-macOS-High-Sierra-ISO.sh. Creates macOS High Sierra ISO file from High Sierra download on Mac App Store. In fact, if you want to install macOS High Sierra on VMware Virtual Machine. Which is free to download and install on a virtual machine like VMware and VirtualBox.
For any other operating system, you will surely search for ISO file on their official website. When you’ve downloaded the file, extract them and you’re prepared to begin with the installation.