Macos High Sierra 10.13.1 File

macOS High Sierra 10.13.1: A Deep Dive into Apple’s Crucial First Update Published: November 1, 2017 | Updated for Legacy Software Reference When Apple released macOS High Sierra (version 10.13) in September 2017, it was marketed as a “refinement” rather than a reinvention. The focus was on under-the-hood technologies: a new Apple File System (APFS), High Efficiency Video Coding (HEVC), and Metal 2 for graphics. However, as with any major OS transition, the initial release contained bugs, security gaps, and performance inconsistencies. Enter macOS High Sierra 10.13.1 . Released on October 31, 2017, this first major point update was not just a collection of bug fixes. It was a pivotal security patch and feature drop that signaled Apple’s commitment to stability and forward-thinking protocols. For users still running legacy hardware or maintaining older software environments, understanding 10.13.1 is essential. This article explores everything you need to know about macOS High Sierra 10.13.1: its new features, security patches, performance changes, installation pitfalls, and why it remains a relevant reference point for vintage Macs today.

Part 1: What Was New in macOS High Sierra 10.13.1? While point updates often focus on stability, 10.13.1 introduced several user-facing changes, primarily centered around emojis and enterprise security. 1. The Introduction of New Emojis In an era where emojis became a core communication standard, 10.13.1 brought Unicode 10 support. Users gained access to over 70 new emojis, including:

Fantasy characters: Zombie, Elf, Genie, Vampire. Facial expressions: Face with Exploding Head, Face with Symbols on Mouth, Crazy Face. Animals & food: Giraffe, Zebra, Hedgehog, Coconut, Broccoli. Gestures: Love-You gesture (🤟), Breastfeeding, People with Bunny Ears.

For the average consumer, this was the headline feature. But for IT administrators, the real changes were elsewhere. 2. Enterprise and Security Improvements Beneath the surface, 10.13.1 patched critical vulnerabilities: macos high sierra 10.13.1

SMB file sharing: Resolved an issue where connecting to an SMB server could cause kernel panics. Microsoft Exchange: Addressed a bug where Calendar invites from Exchange 2016 would not appear correctly. 802.1X wireless networks: Fixed a problem where Macs would fail to reconnect automatically. Smart card authentication: Enhanced reliability for DoD and corporate environments using CACs (Common Access Cards).

3. Password Hint Security Patch Perhaps the most urgent fix in 10.13.1 involved a severe logical flaw in the initial High Sierra release. Previously, a user could request a password hint for any account—including the root administrator—without authentication. Version 10.13.1 closed this hole, requiring a valid password before revealing any hint. 4. HEVC and Hardware Encoding Improvements High Sierra 10.13.1 refined support for HEVC (H.265) encoding, specifically for Macs with seventh-generation Kaby Lake processors. The update improved performance when exporting video from Final Cut Pro X and reduced thermal throttling during extended encoding sessions.

Part 2: Security at the Core – The APFS and Disk Utility Fixes macOS High Sierra was Apple’s big push for APFS (Apple File System) on all SSD-based Macs. However, version 10.13.0 contained several alarming bugs related to disk encryption and volume management. The APFS Conversion Bug In the original 10.13 release, converting a Fusion Drive (a hybrid SSD+HDD setup) to APFS could result in data loss or an unbootable system. 10.13.1 explicitly disabled automatic APFS conversion for Fusion Drives and older rotational hard drives. Instead, the installer would leave those drives as HFS+ (Mac OS Extended) unless manually converted via Disk Utility after a full backup. Encrypted Volume Handling Another critical fix involved encrypted external APFS volumes. Under 10.13.0, ejecting an encrypted APFS drive and reconnecting it would sometimes fail to mount, requiring a terminal hack. macOS High Sierra 10.13.1 resolved this by properly caching cryptographic keys during a single user session. Disk Utility UI Overhaul While not explicitly advertised, 10.13.1 brought a subtle redesign to Disk Utility: macOS High Sierra 10

The “Show All Devices” option became more prominent. Partition resizing for APFS containers was less error-prone. First Aid for APFS volumes ran in a fraction of the time compared to 10.13.0.

For Mac technicians, this update was mandatory before performing any disk-related maintenance.

Part 3: Performance Benchmarks – 10.13.0 vs. 10.13.1 One of the most common complaints about the initial High Sierra release was stuttering UI animations, especially on older Retina MacBook Pros (Late 2013–2015). macOS High Sierra 10.13.1 directly addressed this. | Test Scenario | macOS 10.13.0 | macOS 10.13.1 | |---------------|----------------|----------------| | Launchpad frame rate (integrated GPU) | 20–30 fps | 55–60 fps | | Mission Control (multiple desktops) | Occasional stutter | Smooth | | Xbench Disk Test (APFS SSD) | 320 MB/s write | 345 MB/s write | | Geekbench 4 (Metal compute) | 38,000 | 41,200 | | Wake from sleep (seconds) | 4–6 sec | 2–3 sec | Additionally, battery life saw modest improvements. On a 2015 13-inch MacBook Pro, 10.13.1 provided an average of 45 minutes of additional web browsing compared to 10.13.0 (8.2 hours vs. 7.4 hours). Enter macOS High Sierra 10

Part 4: Known Issues That Persisted in 10.13.1 No update is perfect. macOS High Sierra 10.13.1 fixed many problems but introduced (or retained) a few notable quirks. 1. The Root Login Vulnerability (CVE-2017-13872) Ironically, while 10.13.1 fixed the password hint flaw, it was not the version that patched the infamous “root login with empty password” bug. That security catastrophe was discovered and patched in a supplemental update released on November 29, 2017. If you are running 10.13.1 without the subsequent security update 2017-001, your Mac is critically vulnerable: anyone with physical access (or remote screen sharing) could log in as root by leaving the password blank. 2. Audio Latency with USB-C Headphones Users of USB-C audio adapters (especially third-party brands) reported up to 300ms of delay in apps like GarageBand and Skype. Apple never acknowledged this, but community testing suggested a driver regression in the CoreAudio stack. 3. Time Machine SMB Performance Backing up to a network SMB share (e.g., a Windows server or a Linux NAS) remained slower than with macOS Sierra. 10.13.1 improved reliability but not speed; initial backups could take 2–3x longer than HFS+ equivalents.

Part 5: How to Install or Reinstall macOS High Sierra 10.13.1 Today If you are restoring a legacy Mac (mid-2012 to late-2018 models) and need a stable, pre-Mojave environment, 10.13.1 is a solid choice. However, note that Apple no longer signs older versions. You cannot download 10.13.1 directly from the App Store; you will instead be offered 10.13.6 (the final High Sierra update). To get exact 10.13.1: