
Internet recovery was showing up, but it kept on failing to download the OS files from the servers. In my case, I lost the boot partition of my iMac and didn’t have a TimeMachine backup. If a backup is not there, you have to go for a clean installation either from a bootable USB/DVD drive or the Internet. TimeMachine is the safest option to recover a broken Mac in the offline mode. Make macOS Catalina USB installer on Windows PC In this post, we explore the ways to make a bootable macOS USB for Catalina 10.15, High Sierra 10.13.6, and others from Windows PC and Mac. However, people use this feature only when they have a problem with their computer, mainly when their system is not booting up. It is easy to make a macOS USB disk from the full installer downloaded from the App store Apple provides clear-cut instructions for the same. Also, it helps in recovering a system after a startup failure.


A macOS USB installer saves much time when you want to install the OS offline on two or more Macs.
