Apple Releases Firmware Update for 140W USB-C Power Adapter - MacRumors
Skip to Content

Apple Releases Firmware Update for 140W USB-C Power Adapter

16 inch MBP and 140W Charger FeatureApple today released a firmware update (version 1.4.90) for its 140W USB-C Power Adapter.

It is unclear what is included in the latest firmware, as Apple does not publish release notes for this. The update will be installed automatically over time when the power adapter is plugged in and connected to a Mac or other device. There is no way to manually apply the update.

Popular Stories

Apple iCloud Plus expansion hero

iCloud+ Now Includes Apple TV, Apple Arcade, and Curated Apple Music Stations in Over 100 Countries

Tuesday September 15, 2026 1:43 am PDT by
Apple today announced a new subscription initiative that turns paid iCloud+ subscriptions into a broader services bundle in more than 100 countries. In select countries, Apple says every paid iCloud+ plan, including the cheapest 50GB tier, now includes Apple TV and Apple Arcade "at no additional cost," while family sharing extends the storage, TV and Arcade access to up to five people....
Everything New Your iPhone Can Do on iOS 27 Feature 1

50 New Things Your iPhone Can Do in iOS 27 - Out Now!

Monday September 14, 2026 10:48 pm PDT by
Apple released iOS 27 this week, and despite the company's focus this year on refining its flagship operating system and nixing bugs, there are still many additional features to explore, not least of which is Apple's new context-aware Siri, re-tooled for the generative AI era. Which iPhones Support Every iOS 27 Feature? This year's major iPhone software update isn't all about AI, though,...
iOS 27 Icon iPhone

iOS 27 Available Now With These 8 New Features

Monday September 14, 2026 9:00 am PDT by
Update — 10 a.m. Pacific Time: Apple has released iOS 27. During its iPhone 18 Pro and iPhone Duo event last week, Apple announced that iOS 27 will be released widely on Monday, September 14. iOS 27 should be available around 10 a.m. Pacific Time / 1 p.m. Eastern Time today via the Settings app, under General → Software Update. Below, we have highlighted eight new features and...

Top Rated Comments

rosegoldoli Avatar
1 week ago
the concept of a firmware update for an adapter
Score: 62 Votes (Like | Disagree)
1 week ago
"Help, my charging brick got bricked!"
Score: 48 Votes (Like | Disagree)
It’s always something Avatar
1 week ago
This implies that charging bricks are potentially hackable. Pretty sure I don’t like that 😬
Score: 31 Votes (Like | Disagree)
1 week ago

This is a good thing. In the past, updates happened on the assembly line so you were just stuck with whatever mistake was made for the version you had.
I disagree: When it was hardcoded, the motivation was to get it right the first time or face the consequences of a costly recall. Now, just send it out in beta! We can push a fix whenever. Or... Just never fix it, unless enough people complain.
Score: 29 Votes (Like | Disagree)
chrono1081 Avatar
1 week ago

I disagree: When it was hardcoded, the motivation was to get it right the first time or face the consequences of a costly recall. Now, just send it out in beta! We can push a fix whenever. Or... Just never fix it, unless enough people complain.
You can disagree but that's literally how things happened (and still happen). Look at any single piece of hardware out there and you'll see version numbers. This is what they are.
Score: 19 Votes (Like | Disagree)
GregoryPeckEPA Avatar
1 week ago

This implies that charging bricks are potentially hackable. Pretty sure I don’t like that 😬
Everything in this day and age has some kind of firmware to run it. Even your microwave and blender. Technically it’s all hackable, to some degree.

I wouldn’t lose sleep over it.
Score: 18 Votes (Like | Disagree)