OS X Yosemite 10.10.5 was the final major stability update for Apple’s 10th Macintosh operating system release
10.10.5 Combo Update: If you already have an earlier version of Yosemite installed, you can use the OS X Yosemite 10.10.5 Combo Update to reach the final version. 2. How to Install from the DMG
For many users running older Mac hardware (circa 2007–2014), Yosemite represents the optimal balance between modern software compatibility and system performance. The final, most polished version of this operating system is Mac OS X Yosemite 10.10.5.
App Store Purchase History: If you have previously "purchased" (downloaded) Yosemite, it may still appear in your Purchased tab in the Mac App Store.
Yes. OS X Yosemite was a free update from Apple. It is legally considered abandonware. You never need to pay for the DMG file.
