MacOS High Sierra adds support for High Efficiency Video Coding (HEVC), with hardware acceleration where available, as well as support for High Efficiency Image File Format (HEIF). The system's windowing system, Quartz Compositor, supports Metal 2. It includes virtual-reality and machine-learning features, as well as support for external GPUs. Metal, Apple's low-level graphics API, has been updated to Metal 2. It also has built‑in encryption, crash‑safe protections, and simplified data backup on the go. It supports 64‑bit inode numbers, is designed for flash memory, and is designed to speed up common tasks like duplicating a file and finding the size of a folder's contents. Changes System Apple File System Īpple File System (APFS) replaces HFS Plus as the default file system in macOS for the first time with High Sierra. #Reinstall macos high sierra installThis requires using a patch to modify the install image. It is possible to install High Sierra on many older Macintosh computers that are not officially supported by Apple. MacOS High Sierra requires at least 2 GB of RAM and 20.12 GB of available disk space. The iMac Pro (2017) initially shipped with High Sierra. MacOS High Sierra is supported on all Macintosh products that can run macOS Sierra:
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