When the Internet recovery is stuck and fails to download the OS files, you could use Windows to make a bootable macOS USB installer. Step 3: Make bootable macOS Catalina USB installer on Windows 10 It cleans and converts the USB disk to GUID partition table if it is using MBR or something else. Search and open the command line tool, and run the above given commands in the correct order. Converting the USB disk to have a GUID partition table (GTP) is recommended for this method work effectively.Ĭonnect a USB disk of more than 8GB free space to the Windows PC. So make sure that we keep the partition of the USB disk to have an appropriate scheme. Here we are creating a UBS installer for Mac on Windows. Step 2: Partition USB disk on Windows to make it bootable on Mac Also, you can legally make a macOS DMG by following our tutorial on converting macOS installer. Check our page to get macOS offline installer in DMG format for Catalina, Mojave or High Sierra.
Most of the sites talking about the bootable macOS USB installer on Windows is not guiding on how to arrange the required DMG files for the method.
Hence, If we can download macOS DMG file, then it possible build the USB installer from Windows environment. Luckily some Windows applications support a bootable macOS disk format, DMG. The cross-compatibility of extensions for the two OS are entirely different. If you think about doing it from Windows, the options are limited. Step 1: Download macOS Catalina for WindowsĪs said in the beginning, a Mac is must for creating bootable macOS USB disk. As of now, the OS is Catalina 10.15.4, but the process given below is compatible with all editions of macOS including High Sierra. I did this for making a macOS High Sierra USB drive, and later I was successful in reinstating my iMac. As it is my only Mac, I had no option left, until I found the method to use a Windows PC to create a Mac OS bootable USB installer. 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.
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