Let’s break down why the ISO format is rare for Mavericks, and—if you genuinely need one for a virtual machine like VMware or VirtualBox—how to create a legitimate one yourself. Unlike older versions of OS X (Snow Leopard, Lion) that came on physical DVDs, Mavericks (released in 2013) was the second version of OS X distributed entirely digitally via the Mac App Store.
I have included a factual disclaimer because Mavericks was a free release, and obtaining it as an ISO often involves non-standard conversion methods. Title: Revisiting Mac OS X Mavericks (10.9): Why an ISO is Hard to Find (And How to Make One) If you are scouring the internet for a ready-made Mac OS X Mavericks ISO , you have likely run into a wall of broken links, sketchy torrents, or forums yelling at you to "just use the App Store."
Use this command to create a blank disk image (CDR format), which is identical to ISO: