Apple Says Latest macOS Supplemental Update Addresses Audio and Kernel Panic Issues on 2018 MacBook Pro

Apple on Tuesday released macOS High Sierra 10.13.6 Supplemental Update 2, exclusively for 2018 MacBook Pro with Touch Bar models, but the release notes only mention improved stability and reliability.

macbookprodesign
When contacted by MacRumors for clarification, Apple said the Supplemental Update improves system stability and reliability across a number of areas, and addresses several issues, including crackling audio and kernel panics. Apple said it recommends all users install the update on their MacBook Pros.

The 1.3GB update hasn't been available long enough yet for any conclusive evidence from affected users, with mixed reports across the Apple Support Communities, Reddit, and our own MacRumors discussion forums.

Apple Support Communities user takashiyoshida, for example, claimed his MacBook Pro "no longer outputs the crackling noise" after updating.

"This evening, I set the microphone and speaker's sampling format to 44100 Hz and began playing back music on iTunes," he explained. "Before the update, I would normally hear the noise in about an hour. I left my MacBook Pro to play music for about three hours and so far I am not hearing any noises."

Reddit user onceARMY, however, commented that he was "still getting audio crackling noise while playing YouTube content on Safari." He did note that there were "no issues with the Spotify app" after installing the update.

As far as kernel panics are concerned, a handful of users have reported experiencing at least one since installing the Supplemental Update.

"Installed today's update… and then it happened," wrote MacRumors forum member King724, referring to a kernel panic. He shared a log indicating a system crash related to bridgeOS, the device firmware on the logic board that controls many functions on the 2018 MacBook Pro, including the Apple T2 chip.

Last month, Apple said it was looking into a small number of indirect reports about the kernel panics, but wouldn't say if the T2 chip was to blame.

Similar reports of kernel panicking began last year with the iMac Pro, which is also equipped with the T2, so it did—or perhaps still does—seem to be a potential issue with the chip, or the bridgeOS firmware that manages it. There was some speculation that the T2 chip was also to blame for the crackling.

For context, the T2 chip integrates several previously separate components, including the system management controller, image signal processor, audio controller, and SSD controller. It also features a Secure Enclave coprocessor for secure boot, encrypted storage, and authenticating Touch ID.

Prior to yesterday's Supplemental Update, Apple support representatives provided customers with a wide variety of potential solutions to mitigate these issues, ranging from disabling FileVault to turning off Power Nap, but none of the workarounds appeared to permanently fix the problems.

Apple also asked some customers if they would be willing to send in their MacBook Pros so that its engineers can look into the issues. Some customers were apparently told that fixes were in the works, and at least based on what Apple told us, they are included in the Supplemental Update.

This is the second macOS High Sierra Supplemental Update for the 2018 MacBook Pro in as many months, with the first addressing a bug that contributed to excessive throttling of clock speeds under heavy thermal loads.

The Supplemental Update is not available to macOS Mojave users, but the issues could be resolved in future beta versions.

Top Rated Comments

CrazyForCashews Avatar
56 months ago
Ever since Apple redesigned and updated the MacBook Pro in 2016, there's been nothing but bad news and problems with them. Even more infuriating is how expensive these laptops are. At this point, the redesigned MacBook Pros have a tainted image that I certainly don't want to be a part of.

Get your **** together Apple, making great laptops should be child's play for you. Lay off the iPhone green for a while and sober up.
Score: 30 Votes (Like | Disagree)
86939 Avatar
56 months ago
#TimCooksApple
I hate this kind of response. I have spent tens of thousands of my own money on Apple products over the past decade (including $6,000 on the new MBP). Perhaps you're too young to remember, or just forgot, but things weren't 100% rosy when Steve was around. Remember Antenna Gate on the iPhone 4? We were all holding it wrong... Or how about how gawd awful Apple's cloud offerings used to be? Ever heard of Ping? Social for music...yeah, Myspace already happened.

Crap happens, and at least they are being proactive about trying to fix the issues.
Score: 10 Votes (Like | Disagree)
Delgibbons Avatar
56 months ago
How’s about updating your software so it doesn’t pi$$ing stutter? I recently copped one of these and even Safari stutters when scrolling simple sites, I was shocked given the hardware and high price. Straight up embarrassing from Apple and goes to show it’s the software that really matters. Don’t care about pointless benchmarks. Will be returning mine as it doesn’t feel it’s worth £2,699 at all.

Edit: Running the latest Mojave beta which is supposed to be smoother but it isn’t? I guess you people had a different definition of ‘smooth’ to me. I can’t straight from a late 2013 MacBook Pro running Mavericks and it’s shocking the difference in smoothness (and design too which is hideous looking in comparison to Mavericks in my opinion).
God knows how Apple would manage developing an OS like Windows for BILLIONS of hardware combinations.

Apple can't even develop a stable OS for the 10 or so hardware configurations they haven't forced obsolescence on....
Score: 10 Votes (Like | Disagree)
OldSchoolMacGuy Avatar
56 months ago
Does this also address the kernel panics I've been getting on my 2016 MBP w/TB? Every time I zoom in and out on Google maps I get it.
No. The article clearly says 2018 MacBook Pro. If your model isn't mentioned, this update doesn't cover it. Pretty plain and simple.
Score: 9 Votes (Like | Disagree)
Alphazoid Avatar
56 months ago
Gone are the days when all you had to worry about with the MacBook Pros was whether you got a Samsung or LG display.
Score: 8 Votes (Like | Disagree)
TheMacDaddy1 Avatar
56 months ago
The 2108 Throttlebook Pro has gotten off to a terrible start. Worse when you consider it builds upon the controversial 2016/17 Mabook Pro to begin with.

Apple just needs to end the Mac because they seriously do not care about it.
Score: 7 Votes (Like | Disagree)

Popular Stories

Emergency SOS via Satellite iPhone YT

Apple's iPhone 14 Emergency SOS via Satellite Feature Saves Stranded Man in Alaska

Thursday December 1, 2022 4:37 pm PST by
With the launch of iOS 16.1, Apple rolled out a Emergency SOS via Satellite, which is designed to allow iPhone 14 owners to contact emergency services using satellite connectivity when no cellular or WiFi connection is available. The feature was put to the test in Alaska today, when a man became stranded in a rural area. In the early hours of the morning on December 1, Alaska State Troopers ...
General iOS 16 Feature Yellow

iOS 16.2 for iPhone Launching This Month With These 8 New Features

Thursday December 1, 2022 8:44 am PST by
Apple plans to publicly release iOS 16.2 for the iPhone in mid-December, according to Bloomberg's Mark Gurman. The update remains in beta testing for now, with at least eight new features and changes already uncovered so far. iOS 16.2 introduces a number of new features, including Apple's new whiteboard app Freeform, two new Lock Screen widgets for Sleep and Medications, the ability to hide...
iOS 16

Apple Releases iOS 16.1.2 With Carrier Improvements and Crash Detection Optimizations

Wednesday November 30, 2022 10:09 am PST by
Apple today released iOS 16.1.2, another minor bug fix update that comes one week after the release of iOS 16.1.1 and three weeks after the launch of iOS 16.1, an update that added support for iCloud Shared Photo Library, Matter, Live Activities, and more. The iOS 16.1.2 update can be downloaded on eligible iPhones over-the-air by going to Settings > General > Software Update. According...
iPad 10 Battery Pull Tabs

iPad 10 Teardown Reveals Why Device Isn't Compatible With Apple Pencil 2

Thursday December 1, 2022 10:48 am PST by
Do-it-yourself repair website iFixit today shared a video teardown of Apple's new 10th-generation iPad, providing a closer look inside the tablet and revealing why the device lacks support for the second-generation Apple Pencil. The teardown reveals the internal layout of the iPad, including its two-cell 7,606 mAh battery, logic board with the A14 Bionic chip, and more. As suspected, the...
iOS 16

When Will iOS 16.2 Be Released?

Friday December 2, 2022 2:13 pm PST by
Apple in late October began testing iOS 16.2 and iPadOS 16.2 updates, providing betas to both developers and public beta testers. As of now, we've had four total betas, with the fourth beta having been released earlier this week. iOS 16.2 and iPadOS 16.2 are expected before the end of the year, and we thought we'd try to narrow down the launch timeline. With only four betas released since...
14 vs 16 inch mbp m2 pro and max feature 1

Major RAM Upgrade Coming to Next-Generation MacBook Pro

Friday December 2, 2022 2:03 am PST by
The next-generation MacBook Pro models could feature faster RAM, according to a recent report from a reliable source. MacRumors Forums member "Amethyst," who accurately revealed details about the Mac Studio and Studio Display before those products were announced, recently provided information about Apple's upcoming 14- and 16-inch MacBook Pro models. The new machines are expected to feature...
iOS 16

Apple Still Has These 5 Things to Release Heading Into 2023

Thursday December 1, 2022 7:12 am PST by
The calendar has turned to December and that means Apple has only one month left to fulfill its promises of releasing an Apple Music Classical app and expanding its self-service repair program to Europe before the end of 2022. Delays are always possible, of course, so the plans could be pushed back to 2023. In any case, we have put together a list of five things that Apple still has to release...
iOS 16

Apple Seeds Fourth Betas of iOS 16.2 and iPadOS 16.2 [Update: Public Beta Available]

Thursday December 1, 2022 10:16 am PST by
Apple today seeded the fourth betas of upcoming iOS 16.2 and iPadOS 16.2 updates to developers for testing purposes, with the betas coming two weeks after Apple seeded the third betas of iOS 16.2 and iPadOS 16.2. Registered developers are able to download the iOS 16‌.2 and iPadOS 16.2 profiles from the Apple Developer Center, and once installed, the beta is available over the air. iOS...
iPhone Measure Height

Newer iPhones Allow You to Measure Someone's Height Instantly — Here's How

Saturday December 3, 2022 10:23 am PST by
iPhone 12 Pro and Pro Max, iPhone 13 Pro and Pro Max, and iPhone 14 Pro and Pro Max models feature a LiDAR Scanner next to the rear camera that can be used to measure a person's height instantly in Apple's preinstalled Measure app. To measure a person's height, simply open the Measure app, point your iPhone at the person you want to measure, and make sure they are visible on the screen from...
apple ar headset concept 2

Apple Now Calling AR/VR Headset Operating System 'xrOS'

Thursday December 1, 2022 12:57 pm PST by
Apple has decided to call the software that will run on its upcoming AR/VR headset "xrOS," an update from the original "RealityOS or "rOS" naming the company was planning on, according to Bloomberg. Render created by Ian Zelbo based on rumored information The name change comes as Apple begins to prepare for the launch of the headset, which is expected at some point in 2023. The headset will...