: 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

: Featured a new persistent sidebar, advanced editing tools (such as Curves and Selective Color), and improved "People" identification through neural networks.

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

: 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