Since Apple began distributing macOS (OS X) as an installer app through the Mac App Store starting with version 10.8, they no longer provide official . If you need an ISO for a virtual machine (VMware or VirtualBox) or a bootable drive, you must create one from the installer file. Method 1: Creating a Bootable ISO (Standard Approach)
: Used to copy and manage Mac-formatted disk images on Windows. mac os mavericks iso
If you are on a Windows machine and have the InstallESD.dmg file, you can create a bootable USB drive using third-party tools: Since Apple began distributing macOS (OS X) as
If you prefer a more automated solution, the script shared on the VirtualBox forums can handle the conversion for you. It supports multiple versions including Mavericks (10.9.x) and doesn't require administrator access for this specific version. Method 3: Creating a Bootable USB on Windows If you are on a Windows machine and have the InstallESD
Using hdiutil commands to convert the boot image into a sparse bundle. Resizing and mounting the bundle to add required packages.
: Required to extract internal files like BaseSystem.dmg and the Packages folder from the installer.
If you must download a pre-made ISO (because you don't have access to a Mac to convert it), ensure the file has a matching MD5/SHA1 checksum. Look for the file OSX_10.9_Mavericks.iso with a hash matching known-good community uploads (approx 6.5GB).