Apple Refers to OS X as 'MacOS' in Environmental Webpage Update - MacRumors
Skip to Content

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

macOS 27 on MacBook Pro

macOS 27 Will Mark the End of an Era

Saturday April 18, 2026 6:45 am PDT by
During its Platforms State of the Union segment at WWDC 2025, Apple revealed that macOS 26 Tahoe is the final major macOS version for Intel-based Macs. The upcoming macOS 27 release will be compatible with Apple silicon Macs only, meaning that you will need a Mac with an M-series chip or a MacBook Neo with an A18 Pro chip in order to install the software update. macOS 27 should be available...
Aston Martin CarPlay Ultra Screen

Apple Says CarPlay Ultra is Coming to These Vehicle Brands

Saturday April 18, 2026 5:59 am PDT by
Last year, Apple launched CarPlay Ultra, the long-awaited next-generation version of its CarPlay software system for vehicles. Nearly a year 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. CarPlay Ultra...
Tim Cook Rainbow

Apple CEO Tim Cook Stepping Down, John Ternus Taking Over

Monday April 20, 2026 1:33 pm PDT by
Apple CEO Tim Cook is stepping down as Apple's chief executive officer, and hardware engineering chief John Ternus is set to take over, Apple announced today. Cook will continue on as Apple CEO through the summer, with Ternus set to join Apple's Board of Directors and take over as CEO on September 1, 2026. Cook is going to transition to executive chairman, and he will "assist with certain...

Top Rated Comments

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

Score: 30 Votes (Like | Disagree)
\-V-/ Avatar
131 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
131 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
131 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
131 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
131 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)