macOS X Mavericks (10.9) is an older Apple desktop operating system released in October 2013. Official Apple distribution for macOS installers is via the Mac App Store or Apple support pages; Apple does not provide ISO images for direct download. Obtaining Mavericks as an ISO or DMG should only be done from legitimate, authorized sources to avoid malware and licensing violations.
Before Mavericks, upgrading your Mac cost money. Snow Leopard was $29; Lion and Mountain Lion were $20. When Apple announced Mavericks, they dropped the bombshell: it would be free. mac os x mavericks 10.9 iso and dmg image download
This was a strategic masterstroke. By removing the price barrier, Apple effectively accelerated the adoption rate of the new OS overnight, unifying the Mac user base. It paved the way for the "services" era we live in now, where the OS is a loss leader to get you into the ecosystem. Apple support downloads:
However, that "free" label is exactly why finding a clean Mavericks ISO today is difficult. Apple’s servers no longer host the installer prominently in the App Store for older machines, and because it was never a paid product on physical media, there are no official DVDs to rip. On Apple hardware, create your own installer: