If you don’t have a Macintosh then I recommended use the following guide and install macOS Catalina on VMware. You need to be on a real Mac (aka Macintosh) or have macOS installed as VM. We have already created a step by step guide on how to install macOS Big Sur on VirtualBox and VMware.
macOS Big Sur ISO is for Installing macOS Big Sur on VMware or Virtualbox. In this article, I will show you how to create macOS Big Sur ISO image file.