what is the latest version of imac os
macOS High Sierra
title: MacOS Sierra text: MacOS Sierra macOS Sierra (version 10.12) is the thirteenth major release of macOS (previously ), Apple Inc.'s desktop and server operating system for Macintosh computers. The successor to OS X El Capitan, it was the first version of the operating system issued under the June 2016 rebranding as macOS. Sierra is named after California's Sierra Nevada mountain range. Its major new features concern Continuity, iCloud, and windowing, as well as support for Apple Pay and Siri. The first beta of macOS Sierra was released to developers shortly following the 2016 WWDC keynote on June 13, 2016. The first public-beta release title: MacOS version history text: 2012". macOS Sierra was announced on June 13, 2016, during the WWDC keynote speech. It was released publicly on September 20, 2016. macOS High Sierra was announced on June 5, 2017, during the WWDC keynote speech. It was released on September 25, 2017. The release includes many under-the-hood improvements, including a switch to Apple File System (APFS), the introduction of Metal 2, support for HEVC video, and improvements to VR support. In addition, numerous changes were made to standard applications including Photos, Safari, Notes, and Spotlight. macOS Mojave was announced on June 4, 2018, during the WWDC keynote speech. It title: IMac Pro text: IMac Pro iMac Pro is an all-in-one personal computer and workstation designed, manufactured, and sold by Apple Inc. starting December 14, 2017. Unlike the Mac Pro, Apple claims the iMac Pro is the most powerful Mac ever made. The iMac Pro comes with a custom Apple T2 chip (which stores encrypted keys) and a custom version of macOS High Sierra which allows the user to lock down the booting process (using the Startup Security Utility). The iMac Pro was introduced at WWDC on June 5, 2017 and was released in December 2017, with a starting price of US$4999. Some of title: IMac text: it to be thinner at the edge than older models, with an edge thickness of 5.9mm (but the same maximum depth). It also includes a dual microphone setup, and includes solid-state drive (SSD) or hard disk storage, or an Apple Fusion Drive, a hybrid of solid state and hard disk drives. This version of iMac was announced in October 2012, with the version released in November and the version in December; these were refreshed in September 2013, with new Haswell processors, faster graphics, faster and larger SSD options and 802.11ac Wi-Fi cards. In October 2014, the seventh major revision of title: IMac text: the iMac was announced, whose main feature is a "Retina 5K" display at a resolution of 5120 × 2880 pixels. The new model also includes a new processor, graphics chip, and IO, along with several new storage options. The seventh major revision of the iMac was announced in October 2015. Its main feature is a "Retina 4K" display at a resolution of 4096 × 2304 pixels. It has the same new processor, graphics chip, and I/O as the 27-inch iMac, along with several new storage options. On June 5, 2017, Apple announced a workstation-class version of the iMac, called the