Microsoft Internally Worked on a Mac OS X Aqua Inspired Windows XP Theme

Microsoft tested a Windows XP theme that closely resembled Mac OS X's Aqua GUI, reports The Verge.

twarren windowsxpsqualeak xpaquadbuttons 1

A recent Windows XP source code leak has revealed various unreleased themes that Microsoft developed in 2000, at a time when Microsoft was in heated competition with Apple regarding desktop operating systems.

One of the themes, codenamed "Candy," mirrors the design of Apple's Aqua interface, which was first introduced at the Macworld Conference & Expo in 2000. Aqua was an iconic Apple design and gave a sense of depth through the use of shadow and translucency, metallic textures, and rounded liquid-like assets.

twarren windowsxpsqualeak

The theme was described as a "Whistler skin with eye candy," with "Whistler" being the codename for Windows XP, and was marked as "for internal use only." Though the theme was never finished, fundamental aspects such as the Windows Start button and various UI elements were a close match for Aqua.

Most striking is the replication of Mac OS X's rounded water-like buttons. Windows developers reportedly used the theme as a placeholder to build the theme engine for Windows XP.

The theme was ultimately rejected in favor of the blue and green Luna theme for the final version of Windows XP released in 2001. The source code leak reveals another instance of the influence of the Mac on Windows behind the scenes.

Popular Stories

apple store down feature

Here's Why the Apple Store is Going Down

Thursday November 27, 2025 1:01 pm PST by
Apple's online store is going down for a few hours on a rolling country-by-country basis right now, but do not get your hopes up for new products. Apple takes its online store down for a few hours ahead of Black Friday every year to tease/prepare for its annual gift card offer with the purchase of select products. The store already went down and came back online in Australia and New Zealand, ...
iPhone Pocket Short

iPhone Pocket is Now Completely Sold Out Worldwide

Tuesday November 25, 2025 7:16 am PST by
Apple recently teamed up with Japanese fashion brand ISSEY MIYAKE to create the iPhone Pocket, a limited-edition knitted accessory designed to carry an iPhone. However, it is now completely sold out in all countries where it was released. iPhone Pocket became available to order on Apple's online store starting Friday, November 14, in the United States, France, China, Italy, Japan, Singapore, ...
New Intel Logo

Apple and Intel Rumored to Partner on Mac Chips Again in a New Way

Friday November 28, 2025 7:33 am PST by
While all Macs are now powered by Apple's custom-designed chips, a new rumor claims that Apple may rekindle its partnership with Intel, albeit in a new and limited way. Apple supply chain analyst Ming-Chi Kuo today said Intel is expected to begin shipping Apple's lowest-end M-series chip as early as mid-2027. Kuo said Apple plans to utilize Intel's 18A process, which is the "earliest...
streaming black friday 2025

Best Black Friday Streaming Deals - Save Big on Apple TV, Disney+, Hulu, and More

Thursday November 27, 2025 1:14 pm PST by
We've been focusing on deals on physical products over the past few weeks, but Black Friday is also a great time of year to purchase a streaming membership. Some of the biggest services have great discounts for new and select returning members this week, including Apple TV, Disney+, Hulu, Paramount+, Peacock, and more. Note: MacRumors is an affiliate partner with some of these vendors. When...
Apple Foldable Thumb

Foldable iPhone to Debut These Three Breakthrough Features

Tuesday November 25, 2025 7:09 am PST by
Apple's first foldable iPhone is expected to launch alongside the iPhone 18 Pro models in fall 2026, and it's shaping up to include three standout features that could set it apart from the competition. The book-style foldable will reportedly feature an industry-first 24-megapixel under-display camera built into the inner display, according to a recent JP Morgan equity research report. That...
iphone air camera

iPhone Air Flop Sparks Industry Retreat From Ultra-Thin Phones

Thursday November 27, 2025 3:14 am PST by
Apple's disappointing iPhone Air sales are causing major Chinese mobile vendors to scrap or freeze their own ultra-thin phone projects, according to reports coming out of Asia. Since the ‌iPhone Air‌ launched in September, there have been reports of poor sales and manufacturing cuts, while Apple's supply chain has scaled back shipments and production. Apple supplier Foxconn has...
iphone black friday gold

The Best Black Friday iPhone Deals Still Available

Friday November 28, 2025 6:24 am PST by
Cellular carriers have always offered big savings on the newest iPhone models during the holidays, and Black Friday 2025 sales have kicked off at AT&T, Verizon, T-Mobile, and more. Right now we're tracking notable offers on the iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, and iPhone Air. For even more savings, keep an eye on older models during the holiday shopping season. Note: MacRumors is...

Top Rated Comments

macsplusmacs Avatar
68 months ago
Truly "Redmond, start your copiers" was both bang on truthful and behind the curve.
Score: 44 Votes (Like | Disagree)
AngerDanger Avatar
68 months ago
I remember spending hours as a teen, theming the family PC to look like OS X.

Never knew Microsoft had already done so much work for me.
Score: 37 Votes (Like | Disagree)
quaresma Avatar
68 months ago

Can nobody do anything without Apple doing it first? Jeez... the creative bankruptcy of other tech companies is palpable and the nerve with which they blatantly steal the IP of others is criminal.
yes... Apple is the inventor of all tech in the world. /s
Score: 32 Votes (Like | Disagree)
sracer Avatar
68 months ago

Can nobody do anything without Apple doing it first? Jeez... the creative bankruptcy of other tech companies is palpable and the nerve with which they blatantly steal the IP of others is criminal.
It was an experimental theme and not released to the public. As for Apple doing it first, Apple rarely does things first. They didn't produce the first laptop, mp3 player, nor smartphone, nor tablet. Their offerings weren't even the first successful ones.
Score: 22 Votes (Like | Disagree)
maflynn Avatar
68 months ago

do anything without Apple doing it first? Jeez
I know seriously, it's not like Apple visited Xerox and copied the idea of the mouse, gui and what not. They would never do that

And then inventing the MP3 player :oops:
Score: 22 Votes (Like | Disagree)
almondwine Avatar
68 months ago

Can nobody do anything without Apple doing it first? Jeez... the creative bankruptcy of other tech companies is palpable and the nerve with which they blatantly steal the IP of others is criminal.
Apple almost never does anything first. This is a well understood and well documented tenant of their business model. Sheesh.
Score: 21 Votes (Like | Disagree)