Apple Refers to OS X as 'MacOS' in Environmental Webpage Update

With the launch of the Apple Watch and the fourth-generation Apple TV, Apple debuted two new operating systems -- watchOS and tvOS -- both of which share a common naming scheme with iOS, the operating system that runs on iPhones and iPads.

Apple's unified naming system has led to speculation that OS X, the operating system for the Mac, is due for a name change to MacOS, bringing it in line with watchOS, tvOS, and iOS. Apple won't unveil the name of the next-generation Mac operating system until its 2016 Worldwide Developers Conference, but a new update to the company's website suggests MacOS is on the minds of Apple employees and a candidate for the name of the next upgrade.

maclineup
On a webpage that was updated this morning to share Apple's most recent environmental report, a Frequently Asked Questions section makes a mention of "MacOS." When discussing power consumption of products, MacOS is listed alongside tvOS, iOS, and watchOS.

To model customer use, we measure the power consumed by a product while it is running in a simulated scenario. Daily usage patterns are specific to each product and are a mixture of actual and modeled customer use data. Years of use, which are based on first owners, are assumed to be four years for MacOS and tvOS devices and three years for iOS and watchOS devices.

A mention of "MacOS" was also found buried Library files in OS X 10.11.4 in late March, but the file, "FUFlightViewController_macOS.nib," has been present in the Mac operating system since August of 2015, a month before the public launch of OS X El Capitan.

If Apple does make the switch from "OS X" to "MacOS," it is not clear if the company will stick with naming each iteration after California landmarks, a tradition that started with OS X Mavericks in 2013. Prior to that date, Mac updates were named after large cats, but since then, we've seen OS X Mavericks, OS X Yosemite, and OS X El Capitan. With tvOS, watchOS, and iOS, operating system upgrades follow a number-based naming scheme, with the current versions being tvOS 9.2, watchOS 2.2, and iOS 9.3.1.

Apple is expected to unveil the next version of its Mac operating system, OS X 10.12, at its 2016 Worldwide Developers Conference, which will likely be held from June 13 to June 17. Little is known about OS X 10.12 at this time, but it may be a more significant update than OS X 10.11, introducing Siri support for the Mac for the first time.

Update: Apple has now removed the reference to "MacOS" in its environmental report and replaced it with "OS X".

Tag: macOS
Related Forum: macOS Sierra

Popular Stories

iPhone 17 Pro Dark Blue and Orange

iPhone 17 Pro to Start at $1,049 With Doubled Base Storage

Wednesday August 13, 2025 1:45 am PDT by
Apple's upcoming iPhone 17 Pro will have a starting price that is $50 more than the iPhone 16 Pro but it will come with a minimum 256GB of storage, doubling the base capacity compared to last year's model. The information comes from Chinese leaker Instant Digital, posting on Weibo. The account, which has 1.5 million followers, has now made the claim three separate times in recent weeks....
Golden Apple Logo

Every Apple Secret That Leaked Yesterday

Thursday August 14, 2025 4:13 am PDT by
Apple made a major slip Wednesday when it accidentally included hardware identifiers in software code linking to numerous unannounced products. The leaked information provided MacRumors with concrete evidence of Apple's hardware development across multiple product categories. Here's everything that was confirmed through the code discoveries: New HomePod mini with updated chip – New...
ios 26 liquid glass lock screen beta 6

Apple Changes Liquid Glass Again in iOS 26 Beta 6

Monday August 11, 2025 12:09 pm PDT by
Apple is continuing to tweak the way that the Liquid Glass design looks ahead of the iOS 26 launch, and the latest beta makes a change to the Lock Screen. The Lock Screen clock has been updated with additional transparency, allowing more of the background to peek through. Beta 6 on left, beta 5 on right The clock also has more of a 3D, floating look, which is in line with the rest of the ...
iPhone 17 Pro Feature Dual

When Will Apple Announce the iPhone 17 Event?

Tuesday August 12, 2025 12:46 pm PDT by
It is now mid-August, meaning that Apple's annual iPhone event is just around the corner. This year, Apple is expected to unveil the iPhone 17, the all-new iPhone 17 Air, the iPhone 17 Pro, and the iPhone 17 Pro Max. Here are some of the key rumors for those devices:iPhone 17: Same design as iPhone 16, but with an A19 chip, a larger 6.3-inch display, an upgraded 24-megapixel front camera, ...
maxresdefault

Top 5 Features Coming to the Apple Watch Ultra 3

Tuesday August 12, 2025 11:48 am PDT by
We're just about a month away from Apple's annual September event, and we're going to get a new version of the Apple Watch Ultra for the first time since 2023. There are some useful new features rumored for the Apple Watch Ultra 3, which we've summarized below. Subscribe to the MacRumors YouTube channel for more videos. Satellite Connectivity - The Apple Watch Ultra 3 will be the first...
iPhone 17 Pro 3 4ths Perspective Aluminum Camera Module 1

Alleged iPhone 17 Pro Chassis Offers First Look at All-Aluminum Body

Thursday August 14, 2025 3:40 am PDT by
An alleged iPhone 17 Pro production leak may provide a first look at the device's milled all-aluminum chassis, which this year includes the camera bump – in contrast to last year's iPhone 16 Pro model that features a glass camera module attached to an all-glass back panel. Originally shared by leaker Majin Bu, the image below could be of a moulding, but it still lines up with rumors that...
Apple TV 2025 Thumb 2

New Apple TV Coming Later This Year With A17 Pro Chip

Wednesday August 13, 2025 5:29 pm PDT by
Rumors suggest that Apple is working on an updated version of the Apple TV that's slated for launch later this year. Information about the upcoming device that was found in Apple code indicates that it will be equipped with the A17 Pro chip. There have been multiple rumors about a new Apple TV coming in 2025 with a new A-series processor, but it hasn't been clear which chip Apple would use...
Tim Cook Apple Park

Apple Launching These 10+ New Products Later This Year

Tuesday August 12, 2025 11:08 am PDT by
While the summer months are often relatively quiet for Apple, the company still has many new products coming later this year. Below, we have outlined at least 10 new Apple products that are expected to launch later this year, along with key rumored features for each. This article was originally published last month, and it has been updated with the latest rumors. iPhone 17 Series iPhon...

Top Rated Comments

Bubba Satori Avatar
122 months ago
I wonder how many devs it took to pull this off?

Score: 30 Votes (Like | Disagree)
\-V-/ Avatar
122 months ago
If they're going to go with that naming scheme they might as well change iOS to phoneOS.


I wonder how many devs it took to pull this off?

One of the most annoying quotes of all time. Nobody wanted the Mac Pro to be reinvented into an un-upgradeable trash can. They just wanted it to have the latest specs/features. His commentary on the justification for 16 GB phones is also annoying.
Score: 25 Votes (Like | Disagree)
Bbqthis Avatar
122 months ago
For the love of Pete. OS X or macOS. Don't rebrand it as MacOS. It follows zero capitalization standards for the brand.
Score: 21 Votes (Like | Disagree)
garylapointe Avatar
122 months ago


If Apple does make the switch from "OS X" to "MacOS," it is not clear if the company will stick with naming each iteration after California landmarks, a tradition that started with OS X Mavericks in 2013. Prior to that date, Mac updates were named after large cats, but since then, we've seen OS X Mavericks, OS X Yosemite, and OS X El Capitan.
Is this a concern for anyone?

Name it after different types of fungi and I'm still using it...

Gary
Score: 17 Votes (Like | Disagree)
keysofanxiety Avatar
122 months ago
Sorry, Apple. You got 1 name change, and you've used it. If you're changing it again, I'm calling it 'Mac OS X' again. With that exact spacing and capitalization.
You're a true hero of our time. Thank you for having the courage to take this stand.
Score: 14 Votes (Like | Disagree)
talmy Avatar
122 months ago
It's just going back to having Mac (or mac) in the name, like it was in Mac OS X 10.7 and earlier.

Frankly if they get rid of the "X" it is an improvement because it gets rid of the redundancy. Consider OS X 10.11 the "X" and the "10" refer to the same thing. macOS 10.12 makes a lot of sense to me.
Score: 12 Votes (Like | Disagree)