Sierra 10.13 (17a365) — Macos High

: A 64-bit file system featuring native encryption, crash protection, and instantaneous file cloning.

The technical requirements for 10.13 remained consistent with macOS Sierra. macOS High Sierra 10.13 (17A365)

Technical Overview: macOS High Sierra 10.13 (Build 17A365) macOS High Sierra version 10.13 (Build 17A365) was officially released on September 25, 2017. Positioned as a refinement of the preceding macOS Sierra, it focused heavily on "under-the-hood" performance improvements and architectural updates rather than aesthetic overhauls. System Core & Architecture : A 64-bit file system featuring native encryption,

: Added native support for HEVC (High-Efficiency Video Coding) and HEIF (High-Efficiency Image File Format) , which improved data compression without sacrificing quality. Key Application Updates Positioned as a refinement of the preceding macOS

: Optimized storage by using up to 35% less disk space and introduced "Top Hits" in search results to surface the most relevant emails. Technical Specifications