About Outbyte, uninstall instructions, EULA, Privacy Policy.īefore you proceed, make sure you have enough room on your Mac for the installer file that you need to download. This guide will focus mainly on how to create macOS Big Sur ISO image file, but you can also use this same approach to create an ISO file for macOS Catalina, Mojave, and other macOS versions. Steps to Create macOS Big Sur ISO FileĬreating the macOS Big Sur ISO seems like a complicated task, but it is actually very easy as long as you follow the instructions carefully. We’ll walk through the steps to Create macOS Big Sur ISO file and the things you need to watch out for. app file and does not arrive as a disk image, you need to follow a series of steps involving commands or third-party apps to create a MacOS ISO file. This is especially useful when the typical method of creating a bootable installer drive for macOS is not possible. This format can be used for creating an alternative installer media, whether on an SD card, USB drive, or external hard drive. They can be handy for installing macOS into virtual machines, such as VirtualBox and VMWare, because the resulting installer is an ISO image. ![]() Some advanced Mac users might also want to create an ISO image file of the macOS Big Sur installer file or other macOS installers for that matter. But if you’re in the middle of somewhere where internet connection is not reliable and you need to reinstall macOS, it helps to have a bootable ISO image file in cases of emergency. The first method is ideal if you have a strong and stable internet connection. ![]() There are two ways to install macOS Big Sur on your Mac: using Internet Recovery and using a bootable ISO file.
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