Offers specific build versions (e.g., 13F34) for legacy collectors on the Macintosh Repository site.

Mac OS X Mavericks 10.9 ISO and DMG Image Download , released on October 22, 2013, was a landmark update for Apple as the first version of macOS offered as a free upgrade to users. It introduced over 200 new features, including the addition of iBooks and Maps to the Mac, enhanced multi-display support, and power-saving technologies like Timer Coalescing and App Nap.

The Apple Support Downloads page provides the 10.9.5 Combo Update (approx. 982 MB) to upgrade an existing 10.9 system. Full ISO/DMG Images:

Hosted as a 5.7 GB optical disc image, available at the Internet Archive (10.9.5) .

Since Apple no longer lists Mavericks on the primary Mac App Store search, you may need to use these verified external repositories: