macOS Catalina's Biggest Changes: What to Check Out After Upgrading

macOS Catalina, which came out on Monday, is the newest version of the operating system that runs on the Mac. Catalina brings some significant changes, including the removal of the iTunes app, a new Sidecar feature, an updated Find My app, and more.

In our latest YouTube video and in the article below, we're going to go over some must-know macOS Catalina features that will be useful to those who have just updated and want to familiarize themselves with the changes.

  • No More iTunes - Apple removed iTunes in macOS Catalina, splitting it up into three new apps: Music, TV, and Podcasts. These three apps offer all of the functionality that was previously in iTunes, so you can still get to your music library, access TV shows and movies you purchased, and listen to your favorite podcasts. You can still make iTunes Store purchases, too.
  • Finder Syncing - Since there's no iTunes app, you won't use iTunes to manage your devices that are plugged in. Instead, when you plug in an iPhone or iPad to your Mac, you'll see it in the left side of the Finder window where you can get to all the same controls you had in iTunes.
  • Apple Watch Password Authentication - You've long been able to unlock a Mac with an Apple Watch, but in macOS Catalina, the Apple Watch can also be used to authenticate passwords or approve app installations when you double tap on the Side button. This is especially handy on Macs that don't have Touch ID. Get to the settings by opening up System Preferences and choosing the Security and Privacy section.
  • Sidecar - ‌Sidecar‌ is a new feature in macOS Catalina that lets you use your ‌iPad‌ as a secondary display. The easiest way to activate ‌Sidecar‌ is to click on the AirPlay icon on the Mac. If you have a Sidecar-compatible ‌iPad‌, it will show up in the list of available devices. ‌Sidecar‌ is limited to newer Macs and on the ‌iPad‌, it only works with iPads that support the Apple Pencil. Make sure to check out our Sidecar guide for more info.
  • iPad Apps for Mac - Apple in macOS Catalina introduced new "Catalyst" developer tools that are designed to make it easier for developers to port their ‌iPad‌ apps to the Mac, which means you can expect some of your favorite iOS apps to be available on the Mac. Catalyst apps are still rolling out, but some high-profile options are already available like GoodNotes 5, Carrot Weather, HabitMinder, and more.
  • Find My - There's a new ‌Find My‌ app on the Mac, which brings a dedicated app for finding friends and devices for the first time. ‌Find My‌ combines ‌Find My‌ Mac and ‌Find My‌ Friends, so it's the one-stop shop for whatever you're looking for. ‌Find My‌ even lets you find your Mac when it's closed and has no WiFi connection by leveraging a Bluetooth connection to other iPhones and Apple devices that are nearby. The new ‌Find My‌ capabilities give you a better chance of finding a lost or stolen device.
  • No More 32-Bit Apps - macOS Catalina does not support 32-bit apps, which means some older apps might not work after upgrading. This mostly only applies to apps that haven't been updated in a long time, but it's still something that may take users by surprise. For more info, make sure to check out our 32-bit Mac app guide.

Many of the apps on the Mac have been overhauled with new features. Reminders, for example, has a whole new look and an easier to use interface, while Photos has a new view that organizes everything by day, month, or year. Notes lets you share folders for the first time, and there's a Picture by Picture option in Safari.

For a full rundown on all of the features that you'll find in macOS Catalina, take a look at our macOS Catalina roundup.

Related Forum: macOS Catalina

Popular Stories

iphone 17 models

No iPhone 18 Launch This Year, Reports Suggest

Thursday January 1, 2026 8:43 am PST by
Apple is not expected to release a standard iPhone 18 model this year, according to a growing number of reports that suggest the company is planning a significant change to its long-standing annual iPhone launch cycle. Despite the immense success of the iPhone 17 in 2025, the iPhone 18 is not expected to arrive until the spring of 2027, leaving the iPhone 17 in the lineup as the latest...
apple intelligence black

Report: Apple's AI Strategy Could Finally Pay Off in 2026

Tuesday December 30, 2025 9:01 am PST by
Apple's restrained artificial intelligence strategy may pay off in 2026 amid the arrival of a revamped Siri and concerns around the AI market "bubble" bursting, The Information argues. The speculative report notes that Apple has taken a restrained approach with AI innovations compared with peers such as OpenAI, Google, and Meta, which are investing hundreds of billions of dollars in data...
apple fitness 2026 1

Apple Teases 'Something Big' Coming Soon to Apple Fitness+

Tuesday December 30, 2025 2:11 pm PST by
The Apple Fitness+ Instagram account today teased that the service has "big plans" for 2026. In a video, several Apple Fitness+ trainers are shown holding up newspapers with headlines related to Apple Fitness+. What's Apple Fitness+ Planning for the New Year? Something Big is Coming to Apple Fitness+ The Countdown Begins. Apple Fitness+ 2026 is Almost Here 2026 Plans Still Under ...
iphone 17 pro dark blue 1

iPhone 17 Pro and Pro Max Users Report Static Speaker Noise While Charging

Tuesday December 30, 2025 10:39 am PST by
iPhone 17 Pro and Pro Max owners are having trouble with the speakers of their devices, and have complained about a static or hissing noise that occurs when the iPhone is charging. There are multiple discussions about the issue on Reddit, the MacRumors forums, and Apple's Support Community, where affected users say there is a noticeable static noise "like an old radio." Some people report...
maxresdefault

Hands-On With a Rough iPhone Fold Mockup

Monday December 29, 2025 10:55 am PST by
Apple is rumored to be introducing a foldable iPhone in September 2026, and since it will bring the biggest form factor change since the iPhone was introduced in 2007, curiosity about the design is high. A 3D designer created an iPhone Fold design based on rumors, and we printed it out to see how it compares to Apple's current iPhones. Subscribe to the MacRumors YouTube channel for more ...
maxresdefault

Where's the New Apple TV?

Monday December 22, 2025 11:30 am PST by
Apple hasn't updated the Apple TV 4K since 2022, and 2025 was supposed to be the year that we got a refresh. There were rumors suggesting Apple would release the new Apple TV before the end of 2025, but it looks like that's not going to happen now. Subscribe to the MacRumors YouTube channel for more videos. Bloomberg's Mark Gurman said several times across 2024 and 2025 that Apple would...
Mac Pro Feature Blue

What's Happening With the Mac Pro?

Wednesday December 31, 2025 9:59 am PST by
Apple hasn't updated the Mac Pro since 2023, and according to recent rumors, there's no update coming in the near future. In fact, Apple might be finished with the Mac Pro. Bloomberg recently said that the Mac Pro is "on the back burner" and has been "largely written off" by Apple. Apple apparently views the more compact Mac Studio as the ideal high-end pro-level desktop, and it has almost...
macbook air march 2020

Apple Says Final Intel MacBook Air and Apple Watch Series 5 Now 'Vintage'

Wednesday December 31, 2025 8:39 am PST by
Apple today added the final 13-inch MacBook Air powered by Intel processors, the Apple Watch Series 5, and additional products to its vintage products list. The iPhone 11 Pro was also added to the list after the iPhone 11 Pro Max was added back in September. The full list of products added to Apple's vintage and obsolete list today: MacBook Air (Retina, 13-inch, 2020) iPhone 8 Plus 128GB ...

Top Rated Comments

57004 Avatar
81 months ago
Pretty meh release from a user experience point of view for me as a power user (and using it for work heavily)... I'm not really interested in dumbed-down iPad apps on my Mac, nor the explosion of iTunes (which I never used) into multiple apps in my dock - though they're easily removed. Screen time is irrelevant to me (I don't get why adults need something that's basically a parental guidance tool to control themselves :)). On the UX side Mojave was much bigger for me with its dark mode and selectable accent colours.

But there's lots of goodness under the hood though! More security with read-only OS partition, single-sign-on plugins that fix the mess that SSO was on Mac (especially when apps start supporting it), managed Apple IDs for work, user enrolment (though it'll need another iteration to be actually useful).

Another negative though is the many added dialog boxes with apps asking for permission to send notifications. You totally get swamped with them after the upgrade (which is a bit stupid considering how Apple made fun of Windows Vista's frequent UAC popups ('//www.youtube.com/watch?v=VuqZ8AqmLPY')). They should have just enabled all of the pre-existing apps by default (as it was under Mojave!) and let the user disable them if needed through the preferences panel. The same with the "<app> wants to access Documents" - if I didn't trust an app I wouldn't install it in the first place :rolleyes:. Really missing a "I know what I'm doing - stop bothering me" option - which incidentally Vista DID have :p
Score: 22 Votes (Like | Disagree)
maverick28 Avatar
81 months ago
My opinion of using Catalina for a couple of hours, compared to Lion, Mavericks and – the newest one I run – High Sierra: it is as beautiful as useless. Finder syncing UI sucks big time: I don't see anything what's on my iPhone unlike I was able to in the "bloated" iTunes. Could go on and on but I stop here. It's not an upgrade, it's a downgrade, so I upgraded by returning to High Sierra and sticking to triple boot with the other two OSes that I still use and that give me more usage benefits than this abomination of software. Real shame on Apple.
I don't give a dime about sidecars, screentime, catalyst crappy apps, Apple Watch link. This is not productivity.
Score: 18 Votes (Like | Disagree)
Apple Knowledge Navigator Avatar
81 months ago
Possibly the first OS since Lion that I’ve not been excited about. I mean they actually removed features from music, and the new Photos app is a step backwards from what was almost perfect.
Score: 12 Votes (Like | Disagree)
oldmacs Avatar
81 months ago

I like how the wallpaper flashes off and on three or four times as my 2012 mini is shutting down. Now that’s classy!
There is no more attention to detail.
I wish MacOS was on a two year release cycle...
Score: 11 Votes (Like | Disagree)
Bustycat Avatar
81 months ago
Surprised that so many people started to love iTunes, Dashboard and all of 32-bit apps since October 7.
Score: 10 Votes (Like | Disagree)
Queru Avatar
81 months ago
Best change for me - can’t use my Mac mini, can’t even downgrade properly to Mojave. It’s probably the time to finally jump ship.
Score: 9 Votes (Like | Disagree)