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|Version of macOS|
macOS High Sierra (10.13) is a version of macOS developed by Apple, which was released on 25 September 2017. This version introduces various changes to core macOS components, including a new filesystem (APFS) designed to replace the older HFS+ filesystem used since Mac OS 8.1. This version also introduced separate updates (BridgeOS) for the ARM co-processor included in certain Macs.