macOS High Sierra

macOS High Sierra
Name	macOS High Sierra
Developer	Apple Inc.
Family	macOS (Unix-like)
Working state	Historical
Source model	Closed source with open source components
Initial release	November 13, 2017
Latest release	(see Release History and Version Notes)
Kernel type	Hybrid (XNU)
License	Proprietary; Apple Public Source License

macOS High Sierra macOS High Sierra is the fourteenth major release of macOS by Apple Inc., succeeding macOS Sierra and preceding macOS Mojave. Announced at the WWDC keynote in 2017, it emphasized under-the-hood enhancements, updated media and graphics stacks, and file system changes while maintaining interface continuity with its predecessor for MacBook, iMac, and Mac Pro users.

Overview and System Requirements

High Sierra required Mac models introduced in or after 2009 for certain features, aligning with Intel (company)-based architectures and supporting 64‑bit processors from Intel Core i5 and later generations. System requirements mirrored those of macOS Sierra, mandating at least 2 GB of RAM and 14.3 GB of storage for upgrades on specific models such as MacBook Air (2012), MacBook Pro (2012), iMac (2012), and Mac Mini (2012). The release interacted with App Store (macOS), Time Machine, and firmware update processes tied to EFI and SMC updates for supported models.

New Features and Improvements

High Sierra introduced the Apple File System (APFS) for flash and SSD storage, replacing HFS+ on many configurations and impacting disk utilities like Disk Utility (macOS). The update included support for High Efficiency Video Coding (HEVC/H.265) and High Efficiency Image File Format (HEIF), leveraging hardware accelerators in machines with Intel Quick Sync Video and the Metal graphics API. Graphics and compute enhancements focused on Metal 2, enabling content creation workflows involving Final Cut Pro X, Logic Pro X, and external GPU (eGPU) setups using Thunderbolt 3. The Photos app received organizational and editing improvements influenced by workflows found in Adobe Lightroom and integrations with Apple Photos, while Safari gained autoplay blocking and Intelligent Tracking Prevention extensions similar to privacy features discussed by European Commission regulators.

Application and Framework Updates

System frameworks were revised: Core ML received optimizations for machine learning inference, and ARKit developments paralleled advances in augmented reality seen in iOS 11. Developers used updated versions of Xcode and Swift to target new APIs, while media frameworks such as AVFoundation added HEVC/HEIF support affecting apps like QuickTime Player and third‑party editors such as Adobe Premiere Pro. Mail and Messages saw storage and search refinements in line with server protocols like IMAP and SMTP, and Spotlight integration expanded to bridge content indexing with services such as iCloud Drive and Dropbox (company).

Security and Privacy

Security enhancements encompassed mitigations for vulnerabilities exposed in prior releases, with kernel and userland patches aligning with advisories from entities like US-CERT, CVE listings, and coordination with vendors including Intel Corporation for microcode updates. APFS introduced encryption improvements interoperating with FileVault full‑disk encryption and Trusted Platform Module (TPM)-adjacent workflows for secure key storage, while Safari's Intelligent Tracking Prevention adopted techniques comparable to privacy proposals scrutinized by Federal Trade Commission investigations. High Sierra's update cycle addressed reported bugs and privilege escalation issues that attracted attention from security researchers affiliated with institutions such as University of Cambridge and companies like Google Project Zero.

Release History and Version Notes

High Sierra's public release followed beta cycles with seeds distributed to Apple Developer Program members and the Apple Beta Software Program. Point releases (10.13.x) included stability and security increments, culminating in maintenance updates to 10.13.6 before transition pathways to macOS Mojave were provided. Supplemental updates addressed firmware, kernel, and drivers for Thunderbolt and GPU support; specific builds resolved compatibility with enterprise management tools like Jamf and Microsoft Enterprise Mobility solutions. Updates were distributed through the Mac App Store and later the unified System Preferences Software Update mechanism.

Reception and Legacy

Reception among technology press and professionals was mixed: reviewers from outlets such as The Verge, Wired, and Ars Technica praised APFS and Metal 2 for performance improvements but criticized limited visible user‑facing changes compared to previous releases. Enterprise administrators evaluated migration concerns with APFS and legacy software compatibility reminiscent of transitions like OS X Snow Leopard to modern frameworks. High Sierra's legacy rests on its role as an infrastructure release that enabled subsequent features in macOS Mojave and macOS Catalina, influenced media codec adoption across platforms, and set precedents for Apple's file system and graphics strategies reviewed by academic labs and industry partners including NVIDIA and AMD.

Category:MacOS versions