Apple Releases macOS High Sierra 10.13.6 Supplemental Update for 2018 MacBook Pro Models

by

As we await the launch of macOS Mojave this fall, Apple has quietly released an updated version of macOS High Sierra 10.13.6 that's designed for the 2018 MacBook Pro models.

The new version of the software can be downloaded directly from the Mac App Store or through the Software Update function in the Mac App Store on all compatible Macs that are already running macOS High Sierra.

macOS High Sierra
According to Apple's release notes the update will improve the stability and reliability of the MacBook Pro with Touch Bar, and is recommended for all 2018 machines.

The macOS High Sierra 10.13.6 Supplemental Update 2 improves the stability and reliability of MacBook Pro with Touch Bar (2018) computers, and is recommended for all users.

For detailed information about the security content of this update, please visit: https://support.apple.com/kb/HT201222

It's not entirely clear what specific bugs or security issues are addressed in the new software, but it features build numbers of 17G2307/15P6805, while prior build numbers were 17G2208/15P6703.

Some 2018 MacBook Pro owners have experienced crackling speakers and issues with kernel panics perhaps related to the T2 chip included in the machines, so it's possible the update addresses some of these issues.

Apple in July released an initial supplemental update for the 2018 MacBook Pro models to address a problem that caused the machines to excessively throttle when doing system intensive tasks. Today's update could also potentially include further refinements to processor performance.

macOS High Sierra is reaching the end of its life as Apple prepares to release macOS Mojave, the newest version of macOS that's currently being beta tested by developers and public beta testers. This is likely to be one of the final updates to the High Sierra operating system.

macOS Mojave introduces multiple enticing new features, such as a system-wide dark mode, dynamic wallpapers that shift throughout the day, Desktop Stacks for organizing desktop files, Finder improvements like a more useful Quick Look view and support for Quick Actions, and new apps like Apple News, Stocks, Home, and Voice Memos.

For details on what's coming in macOS Mojave, make sure to check out our macOS Mojave roundup.

Related Forum: macOS High Sierra

Popular Stories

iOS 26

iOS 26.2 Available Next Month With These 8 New Features

Tuesday November 11, 2025 9:48 am PST by
Apple released the first iOS 26.2 beta last week. The upcoming update includes a handful of new features and changes on the iPhone, including a new Liquid Glass slider for the Lock Screen's clock, offline lyrics in Apple Music, and more. In a recent press release, Apple confirmed that iOS 26.2 will be released to all users in December, but it did not provide a specific release date....
Read Full Article • 68 comments
m1 chip slide

Five Years of Apple Silicon: M1 to M5 Performance Comparison

Monday November 10, 2025 1:08 pm PST by
Today marks the fifth anniversary of the Apple silicon chip that replaced Intel chips in Apple's Mac lineup. The first Apple silicon chip, the M1, was unveiled on November 10, 2020. The M1 debuted in the MacBook Air, Mac mini, and 13-inch MacBook Pro. The M1 chip was impressive when it launched, featuring the "world's fastest CPU core" and industry-leading performance per watt, and it's only ...
Read Full Article • 175 comments
AirPods Pro Firmware Feature

Apple Releases New Firmware for AirPods Pro 2, AirPods Pro 3, and AirPods 4

Thursday November 13, 2025 11:35 am PST by
Apple today released new firmware designed for the AirPods Pro 3, the AirPods 4, and the prior-generation AirPods Pro 2. The AirPods Pro 3 firmware is 8B25, while the AirPods Pro 2 and AirPods 4 firmware is 8B21, all up from the prior 8A358 firmware released in October. There's no word on what's include in the updated firmware, but the AirPods Pro 2, AirPods 4 with ANC, and AirPods Pro 3...
Read Full Article • 42 comments
iphone pocket%402x

Apple Debuts iPhone Pocket, a Limited Edition iPod Sock-Style Accessory

Tuesday November 11, 2025 1:23 am PST by
Apple has teamed up with Japanese fashion house ISSEY MIYAKE to launch iPhone Pocket, a 3D-knitted limited edition accessory designed to carry an iPhone, AirPods, and other everyday items. The accessory is like a stretchy pocket, not unlike an iPod Sock, but elongated to form a strap made of a ribbed, elastic textile that fully encloses an iPhone yet allows you to glimpse the display...
Read Full Article • 289 comments
homepod mini colors

New HomePod Mini Coming Soon With These Features

Tuesday November 11, 2025 7:30 am PST by
Apple is expected to announce a new HomePod mini imminently, headlining with new chips. Here are all of the new features we're expecting. The second-generation HomePod mini is highly likely to contain a more up-to-date chip for more advanced computational audio and improved responsiveness. The current HomePod mini is equipped with the Apple Watch Series 5's S5 chip from 2019. Apple is likely ...
Read Full Article • 119 comments
ios 26 digital id passport wallet

Apple Announces Launch of U.S. Passport Feature in iPhone's Wallet App

Wednesday November 12, 2025 9:15 am PST by
Apple today announced that iPhone users can now create a Digital ID in the Apple Wallet app based on information from their U.S. passport. To create and present a Digital ID based on a U.S. passport, you need: An iPhone 11 or later running iOS 26.1 or later, or an Apple Watch Series 6 or later running watchOS 26.1 or later Face ID or Touch ID and Bluetooth turned on An Apple Account ...
Read Full Article • 276 comments
homepod mini thumb feature

New HomePod Mini, Apple TV, and AirTag Were Expected This Year — Where Are They?

Wednesday November 12, 2025 11:42 am PST by
While it was rumored that Apple planned to release new versions of the HomePod mini, Apple TV, and AirTag this year, it is no longer clear if that will still happen. Back in January, Bloomberg's Mark Gurman said Apple planned to release new HomePod mini and Apple TV models "toward the end of the year," while he at one point expected a new AirTag to launch "around the middle of 2025." Yet,...
Read Full Article • 109 comments
Tesla Charging

Tesla Working to Add Apple CarPlay Support to Vehicles

Thursday November 13, 2025 8:31 am PST by
Tesla is working to add support for Apple CarPlay in its vehicles, Bloomberg's Mark Gurman reports. Tesla vehicles rely on its own infotainment software system, which integrates vehicle functions, navigation, music, web browsing, and more. The automaker has been an outlier in foregoing support for Apple CarPlay, which has otherwise become an industry standard feature, allowing users to...
Read Full Article • 261 comments
CarPlay Pinned Messages

iOS 26.2 Adds New CarPlay Setting

Thursday November 13, 2025 6:48 am PST by
iOS 26 extended pinned conversations in the Messages app to CarPlay, for quick access to your most frequent chats. However, some drivers may prefer the classic view with a list of individual conversations only, and Apple now lets users choose. Apple released the second beta of iOS 26.2 this week, and it introduces a new CarPlay setting for turning off pinned conversations in the Messages...
Read Full Article • 23 comments
iphone air thinness

iPhone Air Sales Are So Bad That Apple's Delaying the Next-Generation Version

Monday November 10, 2025 11:41 am PST by
The thin, light iPhone Air sold so poorly that Apple has decided to delay the launch of the next-generation iPhone Air that was scheduled to come out alongside the iPhone 18 Pro, reports The Information. Apple initially planned to release a new iPhone Air in fall 2026, but now that's not going to happen. Since the iPhone Air launched in September, there have been reports of poor sales...
Read Full Article • 578 comments

Top Rated Comments

maflynn Avatar
maflynn
94 months ago
Why not?
Because the iMac Pro has been dealing with the T2 crashes longer and needs to be addressed as well.
Score: 7 Votes (Like | Disagree)
Weaselboy Avatar
Weaselboy
94 months ago
I'm a somewhat gambling man, so I installed the update. No firmware update, so whatever they did is pure software.
There is a firmware update in this. I went from 15.16.6703.0.0,0 to 15.16.6805.0.0,0.
Score: 6 Votes (Like | Disagree)
nattK Avatar
nattK
94 months ago
I'm pretty sure it's for the bridge os error/kernel panics on the 2018 MBP with touch bar. I had been experiencing a lot of them and have been working with a senior advisor and apple engineers for quite a while. I was told last week that a software fix was coming soon to address the issue. I thought they were referring to Mojave but I guess this is it
Score: 5 Votes (Like | Disagree)
ghostface147 Avatar
ghostface147
94 months ago
I guess I am lucky with my 2018 MacBook Pro. No issues, no kernel panics, nothing. I feel left out. Now I jinxed myself.
Score: 5 Votes (Like | Disagree)
deadspider187 Avatar
deadspider187
94 months ago
Cinebench went from ~938 to ~990 CPU and ~89FPS to ~92FPS OPENGL. I think this may have included further performance improvements. I'm curious if others see the same.

Edit: 2.2GHz 555x model
Score: 5 Votes (Like | Disagree)
Winni Avatar
Winni
94 months ago
Just die already. Mojave can't get here fast enough! HS has been a support nightmare for me.
And you honestly believe that a "new" macOS version will fix all the things that the point releases for the current OS version have not fixed...?

The major problem with macOS and also Windows these days is that both platforms are in perpetual beta - and QA and bug fixing are no longer on the agenda.
Score: 4 Votes (Like | Disagree)
Read All Comments