answers: 10.7
context: a universal binary, meaning that the installer disc supported both Intel and PowerPC processors. Mac OS X 10.6 Snow Leopard was the first release to be available exclusively for Intel-based Macs. In 2011, Apple released Mac OS X 10.7 Lion, which no longer supported 32-bit Intel processors and also did not include Rosetta. All versions of the system released since then run exclusively on 64-bit Intel CPUs and do not support PowerPC applications. The heritage of what would become macOS had originated at NeXT, a company founded by Steve Jobs following his departure from Apple in 1985. There, the Unix-like </s> name of the system was shortened from Mac OS X to OS X. That year, Apple removed the head of OS X development, Scott Forstall, and design was changed towards a more minimal direction. Apple's new user interface design, using deep color saturation, text-only buttons and a minimal, 'flat' interface, was debuted with iOS 7 in 2013. With OS X engineers reportedly working on iOS 7, the version released in 2013, OS X 10.9 Mavericks, was something of a transitional release, with some of the skeuomorphic design removed, while most of the general interface of Mavericks remained unchanged. The next </s> design made worse when Apple extended the file system to support Unicode. Initially, HFS+ was designed for classic Mac OS, which runs on big-endian 68K and PowerPC systems. When Apple switched Macintosh to little-endian Intel processors, it continued to use big-endian byte order on HFS+ file systems. As a result, macOS on current Macs must do byte swap when it reads file system data. These concerns are being addressed with the new Apple File System, which is used for file systems on SSDs in macOS High Sierra. The Darwin subsystem in macOS is in charge of managing the file system,
question: most up to date version of mac os