Use the createinstallmedia command inside the .app bundle. Replace MyVolumeName with the actual volume name:
Convert to standard ISO/CDR format:
While this requires some technical comfort with Terminal commands, it guarantees a clean, unmodified file.
Older Macs (pre-2012) may not support APFS. For macOS High Sierra or later, you need a firmware update. Stick to macOS Sierra (10.12) or El Capitan (10.11) for very old Intel Macs.
mv /tmp/Sonoma.cdr ~/Desktop/Sonoma.iso Use code with caution. Mac Os Download Iso 64 Bit
Then run the installer again.
hdiutil create -o /tmp/macOS -size 16000m -volname macOS -layout SPUD -fs HFS+J Use code with caution.
All modern versions of macOS—including Big Sur, Monterey, Ventura, Sonoma, and Sequoia—are strictly 64-bit operating systems. When searching for a "macOS download ISO 64-bit" file, you are looking for the installation media needed to boot virtual environments like VMware Workstation, VirtualBox, or QEMU. Why Apple Doesn't Provide ISO Files Directly
Mount the image:
This method is complex and often fails. The resulting ISO may not be bootable because Windows cannot properly create HFS+/APFS file systems. A virtual machine (macOS in VMware on Windows) is a better approach.
This happens when the USB drive is not formatted correctly. Use Disk Utility to erase the USB drive as with a GUID Partition Map, then retry the createinstallmedia command.
Available via System Settings or App Store search. macOS Monterey (12): Searchable via the App Store.
Here is the general logic for the command (specifics vary slightly by OS version): Use the createinstallmedia command inside the
softwareupdate --list-full-installers
Open the app ( Command + Space and type Terminal) and execute the following commands line by line.
All modern versions of macOS are 64‑bit, but the transition was gradual.