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

iPhone 17 Pro Dark Blue and Orange

When Is iPhone 17 Coming Out?

Thursday July 24, 2025 9:11 am PDT by
Apple's iPhone 17 series is expected to debut in September 2025. This release follows Apple's recent trend of introducing new iPhone models annually in the fall. To unveil the iPhone 17, iPhone 17 Air, iPhone 17 Pro, and iPhone 17 Pro Max, Apple is expected to hold its annual iPhone announcement event during the week of September 8, 2025, with September 9 or 10 emerging as the most likely...
iPhone 17 Pro on Desk Centered 1

iPhone 17 Pro Launching in Two Months With These 16 New Features

Saturday July 26, 2025 5:50 am PDT by
Apple's iPhone 17 Pro and iPhone 17 Pro Max should launch in late September, and there are plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models, as of July 2025:Aluminum frame: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone 16 Pro models have a titanium frame, and the iPhone X through iPhone 14...
iPhone 17 Pro on Desk Centered 1

Tipster: iPhone 17 Pro to Feature 8x Zoom, Pro Camera App, and More

Sunday July 27, 2025 7:35 am PDT by
Apple's upcoming iPhone 17 Pro models will have several new camera-related features, according to an anonymous tipster who contacted MacRumors today. The tipster claimed to be familiar with an iPhone 17 Pro commercial that is allegedly being produced by a film company that has publicly listed Apple as one of its clients. MacRumors has not independently confirmed any of the information shared ...
Apple Watch Ultra 2 Complications

Apple Watch Ultra 3: What to Expect

Thursday July 24, 2025 7:08 am PDT by
The long wait for an Apple Watch Ultra 3 is nearly over, and a handful of new features and changes have been rumored for the device. Below, we recap what to expect from the Apple Watch Ultra 3:Satellite connectivity for sending and receiving text messages when Wi-Fi and cellular coverage is unavailable 5G support, up from LTE on the Apple Watch Ultra 2 Likely a wide-angle OLED display that ...
Apple Partridge Creek

Apple Store in Michigan Permanently Closing Next Month

Saturday July 26, 2025 1:51 pm PDT by
Earlier this month, MacRumors was first to report that Apple was planning to permanently close its Partridge Creek store, just outside of Detroit, Michigan, and now the company has announced a closure date for the location. Apple Partridge Creek Apple Partridge Creek's final day of business will be Saturday, August 16, with the store set to close for good at 8 p.m. local time that day. All of ...
iOS 18

Apple Shares iOS 18.6 Release Notes

Thursday July 24, 2025 6:33 am PDT by
While the focus is now on iOS 26, there is still an iOS 18.6 update incoming. As noted by Aaron Zollo, Apple on Wednesday re-labeled iOS 18.6 Beta 4 as simply iOS 18.6, meaning that it is the Release Candidate version. This change effectively confirms that the update will be released to the public next week. Alongside the new label, Apple shared release notes for iOS 18.6, which is a...
iPhone 17 Colors

All 15 New iPhone 17 and iPhone 17 Pro Colors Leaked

Friday July 25, 2025 6:20 am PDT by
We may finally have a definitive list of all color options for the iPhone 17 series, ahead of the devices launching in September. MacRumors concept In a Macworld report this month, Filipe Espósito said he obtained an "internal document" that allegedly reveals all of the color options for the upcoming iPhone 17, iPhone 17 Air, iPhone 17 Pro, and iPhone 17 Pro Max models. The report...
iPhone 17 Pro on Desk Centered 1

iPhone 17 Pro Launching in Two Months With These 16 New Features

Tuesday July 22, 2025 5:00 pm PDT by
Apple's iPhone 17 Pro and iPhone 17 Pro Max are less than two months away, and there are plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models, as of July 2025:Aluminum frame: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone 16 Pro models have a titanium frame, and the iPhone X through iPhone 14...

Top Rated Comments

MacFather Avatar
66 months ago
Deleted.
Score: 64 Votes (Like | Disagree)
backslash-f Avatar
66 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
66 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
66 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
66 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
66 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)