You’ll now have Mavericks.iso on your Desktop, ready for VirtualBox/VMware or burning to a USB/DVD. If you don’t need ISO, the DMG is easier. Use this archived Apple link (still active):
softwareupdate --fetch-full-installer --full-installer-version 10.9 If the above fails (older Macs only), use this direct Apple link in your browser: http://updates-http.cdn-apple.com/2019/cert/061-39476-20191023-48f2f24c-3f6f-4d72-8324-7b1b6666d2a0/InstallOSX.dmg Download Mac OS X Mavericks -10.9- ISO directly for free.
Open Terminal (on a Mac) and paste this command: You’ll now have Mavericks