Developer's Visual Comparison of macOS Catalina and Big Sur Offers Closer Look at Apple's UI Redesign for Macs

macOS 11 Big Sur is the next major release of Apple's operating system for Mac, and following its preview at WWDC, one of the biggest discussions has revolved around the all-new user interface redesign.

Andrew Denty
Developers are still learning what the impact the new UI will have on their apps, and with that in mind, app designer Andrew Denty has compiled an extensive visual comparison of the user interface changes between macOS Catalina and macOS Big Sur.

All of the screenshots are taken on a default install of macOS and the Catalina version is always on the left. I made a conscious effort not to resize any windows or change any default settings. I haven't captured everything, but it is a good taste of the changes so far.

The side-by-side comparisons cover changes to Finder, Preview, System Preferences, the menu bar, Notification Center, Safari, Calendar, Contacts, Reminders, Notes, Photos, Apple Music, Podcasts, and many other native apps.

Andrew Denty
Overall, Denty's takeaway is that the UI differences in Big Sur aren't as dramatic as he first thought, consisting of a "largely incremental set of changes to make macOS feel more coherent with iOS and iPad OS."

That said, he thinks Apple "still has a vast amount of work to do to perfect the new macOS UI" before it exits the beta, and he hopes to see more consistency in the launch experience of apps, as well as more visual separation in elements like status bars and path bars, which he admits "look a little unloved" and don't yet feel properly integrated.


Big Sur is available for developers at the current time, but Apple also plans to make a beta available for public beta testers in July, followed by an official release in the fall. What are your thoughts on the redesigned UI? Let us know in the comments below, and don't forget to check out our Big Sur roundup for an extensive look at all the new features.

Related Forums: macOS Catalina, macOS Big Sur

Popular Stories

iOS 26

iOS 26.1 Available Now With These 8 New Features

Monday November 3, 2025 5:54 am PST by
Following more than a month of beta testing, Apple released iOS 26.1 on Monday, November 3. The update includes a handful of new features and changes, including the ability to adjust the look of Liquid Glass and more. Below, we outline iOS 26.1's key new features. Liquid Glass Toggle iOS 26.1 lets you choose your preferred look for Liquid Glass. In the Settings app, under Display...
Finder Siri Feature

Apple's New Siri Will Be Powered By Google Gemini

Wednesday November 5, 2025 11:57 am PST by
The smarter, more capable version of Siri that Apple is developing will be powered by Google Gemini, reports Bloomberg. Apple will pay Google approximately $1 billion per year for a 1.2 trillion parameter artificial intelligence model that was developed by Google. For context, parameters are a measure of how a model understands and responds to queries. More parameters generally means more...
2024 iPhone Boxes Feature

Apple Adjusts Trade-In Values for iPhones, iPads, Macs, and More

Thursday November 6, 2025 11:12 am PST by
Apple today updated its trade-in values for select iPhone, iPad, Mac, and Apple Watch models. Trade-ins can be completed on Apple's website, or at an Apple Store. The charts below provide an overview of Apple's current and previous trade-in values in the U.S., according to its website. Maximum values for most devices either decreased or saw no change, but the iPad Air received a slight bump. ...
Apple Logo Spotlight

Report: Apple to Launch These New Products in 2026

Sunday November 2, 2025 5:34 am PST by
Apple is planning to launch at least 15 new products in 2026, according to Bloomberg's Mark Gurman. Gurman outlined what to expect from Apple in 2026 in the latest edition of his "Power On" newsletter. He said the company is heading "into one of its most pivotal years in recent memory," with the rollout of major new Apple Intelligence features, intense regulatory pressure on the App Store,...
iOS 26

Apple Releases iOS 26.1 With Liquid Glass Toggle, Slide to Stop Alarm, New Apple Intelligence Languages and More

Monday November 3, 2025 1:11 pm PST by
Apple today released iOS 26.1, the first major update to the iOS 26 operating system that came out in September, iOS 26.1 comes over a month after iOS 26 launched. ‌iOS 26‌.1 is compatible with the ‌iPhone‌ 11 series and later, as well as the second-generation ‌iPhone‌ SE. The new software can be downloaded on eligible iPhones over-the-air by going to Settings > General >...
Liquid Glass General Feature

Apple Shares Liquid Glass Design Gallery

Thursday November 6, 2025 2:45 pm PST by
Apple is promoting the new Liquid Glass design in iOS 26, showing off the ways that third-party developers are embracing the aesthetic in their apps. On its developer website, Apple is featuring a visual gallery that demonstrates how "teams of all sizes" are creating Liquid Glass experiences. The gallery features examples of Liquid Glass in apps for iPhone, iPad, Apple Watch, and Mac. Apple...
Early Black Friday Deals 2

The Best Early Black Friday Apple Deals

Sunday November 2, 2025 10:04 am PST by
We're officially in the month of Black Friday, which will take place on Friday, November 28 in 2025. As always, this will be the best time of the year to shop for great deals, including popular Apple products like AirPods, iPad, Apple Watch, and more. In this article, the majority of the discounts will be found on Amazon. Note: MacRumors is an affiliate partner with some of these vendors. When ...
apple watch se 3 always on

Apple to Remove iPhone-Apple Watch Wi-Fi Sync in EU With iOS 26.2

Thursday November 6, 2025 4:37 am PST by
Apple in iOS 26.2 will disable automatic Wi-Fi network syncing between iPhone and Apple Watch in the European Union to comply with the bloc's regulations, suggests a new report. Normally, when an iPhone connects to a new Wi-Fi network, it automatically shares the network credentials with the paired Apple Watch. This allows the watch to connect to the same network independently – for...

Top Rated Comments

MacFather Avatar
70 months ago
Deleted.
Score: 64 Votes (Like | Disagree)
backslash-f Avatar
70 months ago
I'm currently using it and I'm in love with it.



It feels fresh and I had no big issues so far. Some UI glitches here and there but that's all.

Attachment Image
Score: 25 Votes (Like | Disagree)
SW3029 Avatar
70 months ago

It is the infantilization of software, making it appeal to kids rather than adults. Candification, with transparency and effects using the combined wattage of a medium nuclear power plant. Duolingofication, just plain silly.
Quite the contrary, it looks fantastic. This refresh is long overdue. Very excited to get it.
Score: 20 Votes (Like | Disagree)
PickUrPoison Avatar
70 months ago

Is it stable enough to be installed on my corporate machine?
K.
A developer beta? Ummmm sure. Roll that puppy out to the production machines. That’s what your corporate IT department recommended, right? ?
Score: 17 Votes (Like | Disagree)
macdos Avatar
70 months ago
It is the infantilization of software, making it appeal to kids rather than adults. Candification, with transparency and effects using the combined wattage of a medium nuclear power plant. Duolingofication, just plain silly.
Score: 16 Votes (Like | Disagree)
Elijen Avatar
70 months ago
The only thing that bothers me about the redesign is lack of contrast for controls/buttons.

I always remove all apps from Dock after installing macOS so don't really care about the icons much (and like most of them anyway).


Question for anyone with the preview: can you right click on the window name in Finder to get access to the folder hierarchy or is that completely gone now?
You can still do that:



Attachment Image
Score: 14 Votes (Like | Disagree)