*This system can run the last version of OS X 10.10 "Yosemite" and OS X 10.11 "El Capitan," although advanced feature support is minimal (Mac-to-Mac AirDrop is supported). When running Mac OS X 10.6 "Snow Leopard" it is not supported booting in 64-bit mode. It is capable of running macOS Sierra (10.12) as well, although the Universal Clipboard, Auto Unlock, and Apple Pay features are not supported. Finally, this model is capable of running macOS High Sierra (10.13), and it supports HEVC (High-Efficiency Video Coding), but it does notsupport hardware accelerated HEVC. It is not compatible with macOS Mojave (10.14) or later versions of the operating system.
Additionally, please note that OS X "Lion" 10.7 and subsequent versions of OS X are not capable of running Mac OS X apps originally written for the PowerPC processor as these operating systems do not support the "Rosetta" environment. To run PowerPC applications on this Mac, it will be necessary to use Mac OS X 10.6 "Snow Leopard".