Apple Releases macOS Mojave 10.14.5 Supplemental Update for 2018 and 2019 15-Inch MacBook Pro

Apple today quietly released an updated version of macOS Mojave 10.14.5, which is designed for 15-inch MacBook Pro models that feature a T2 security chip, aka the 2018 and 2019 machines.

The new version of the software can be downloaded through the "Software Update" section of System Preferences on all compatible Macs.

macosmojavestacks
According to Apple's release notes, the new software addresses a "firmware issue" impacting Macs with a T2 chip. Apple provided no additional detail, so we don't know what the specific firmware issue might be, but we may get more information when the security notes become available.

The MacBook Pro Supplemental Update addresses a firmware issue affecting 15-inch MacBook Pro computers with T2 Security Chip, and is recommended for all users.

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

Apple released the macOS Mojave 10.14.5 update on May 13, adding AirPlay 2 support for sharing music, photos, videos, and more from the Mac to ‌AirPlay‌ 2-enabled smart TVs from companies like Samsung, Vizio, LG, and Sony.

Minor Apple News+ interface changes were included, allowing users to follow a magazine directly from the catalog browsing view, and there were improvements to audio latency on 2018 machines.

Related Roundup: MacBook Pro
Buyer's Guide: MacBook Pro (Caution)
Related Forum: MacBook Pro

Popular Stories

Aston Martin CarPlay Ultra Screen

Apple's CarPlay Ultra to Expand to These Vehicle Brands Later This Year

Sunday February 1, 2026 10:08 am PST by
Last year, Apple launched CarPlay Ultra, the long-awaited next-generation version of its CarPlay software system for vehicles. Nearly nine months later, CarPlay Ultra is still limited to Aston Martin's latest luxury vehicles, but that should change fairly soon. In May 2025, Apple said many other vehicle brands planned to offer CarPlay Ultra, including Hyundai, Kia, and Genesis. In his Powe...
iOS 26

iOS 26.3 and iOS 26.4 Will Add These New Features to Your iPhone

Tuesday February 3, 2026 7:47 am PST by
We are still waiting for the iOS 26.3 Release Candidate to come out, so the first iOS 26.4 beta is likely still at least a week or two away. Following beta testing, iOS 26.4 will likely be released to the general public in March or April. Below, we have recapped known or rumored iOS 26.3 and iOS 26.4 features so far. iOS 26.3 iPhone to Android Transfer Tool iOS 26.3 makes it easier...
Apple Logo Black

Apple's Next Launch is 'Imminent'

Sunday February 1, 2026 12:31 pm PST by
The calendar has turned to February, and a new report indicates that Apple's next product launch is "imminent," in the form of new MacBook Pro models. "All signs point to an imminent launch of next-generation MacBook Pros that retain the current form factor but deliver faster chips," Bloomberg's Mark Gurman said on Sunday. "I'm told the new models — code-named J714 and J716 — are slated...
Apple MacBook Pro M4 hero

New MacBook Pros Reportedly Launching Alongside macOS 26.3

Sunday February 1, 2026 5:42 am PST by
Apple is planning to launch new MacBook Pro models with M5 Pro and M5 Max chips alongside macOS 26.3, according to Bloomberg's Mark Gurman. "Apple's faster MacBook Pros are planned for the macOS 26.3 release cycle," wrote Gurman, in his Power On newsletter today. "I'm told the new models — code-named J714 and J716 — are slated for the macOS 26.3 software cycle, which runs from...
iOS 26 Home Feature

Apple Gives Final Warning to Home App Users

Tuesday February 3, 2026 8:55 am PST by
In 2022, Apple introduced a new Apple Home architecture that is "more reliable and efficient," and the deadline to upgrade and avoid issues is fast approaching. In an email this week, Apple gave customers a final reminder to upgrade their Home app by February 10, 2026. Apple says users who do not upgrade may experience issues with accessories and automations, or lose access to their smart...

Top Rated Comments

ghostface147 Avatar
88 months ago
2018 MB Pro owner:

Build went from 18F132 to 18F203
Bootrom version went from 220.260.170.0.0 (iBridge 16.16.5125.0,0) to 220.260.171.0.0 (iBridge 16.16.5200.0.0,0)
T2 firmware went from 16P5125 to 16P5200

La di da
Score: 7 Votes (Like | Disagree)
anshuvorty Avatar
88 months ago
I wonder if this fixes the BridgeOS error issue that has been complained about ad nauseam on this forum?!?!??! Hmm...
Score: 7 Votes (Like | Disagree)
linxy33 Avatar
88 months ago
I wonder if this update removes the bezel
Score: 6 Votes (Like | Disagree)
JessWinter Avatar
88 months ago
I wonder if this update removes the bezel
Can confirm, it sadly does not :(
Score: 5 Votes (Like | Disagree)
jonnysods Avatar
88 months ago
So many of us are going to be waiting a month or two to see what other bugs are revealed in the 2019 models. I'm really hoping to get one later this year - wouldn't want to be an early adopter though.
Score: 4 Votes (Like | Disagree)
anshuvorty Avatar
88 months ago
On a tangential note, I wonder when iMacs will get T2 (or whatever version) chip?
When Apple finally decides to remove the spinning HDD from the entry level iMac SKUs. T2 don't work with spinning hard drives.
Score: 4 Votes (Like | Disagree)