As a refinement update, macOS 10.13 High Sierra doesn’t seem to offer much over 10.12 Sierra, but there’s a lot going on beneath the surface. Ars Technica’s Andrew Cunningham takes a deep dive into the foundational improvements coming to High Sierra, including the APFS filesystem, the HEVC video and HEIF image formats, and the Metal 2 graphics API. Although most users won’t likely even realize these technologies are in play, they should make your Mac faster and more efficient. follow link
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Under High Sierra’s Hood