- Apple's new macOS Catalina is ditching 32-bit app support, which means some apps may not work in the new update.
- MacOS Catalina will only support 64-bit apps.
- There's a quick and easy way in macOS Mojave to see if your current apps are 32-bit or 64-bit.
- Even if your apps are 32-bit in macOS Mojave, the app's developers might have a 64-bit version ready for macOS Catalina, especially if the developer is recognized by Apple.
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For the new macOS Catalina update, Apple is ditching certain low-powered versions of apps, know as "32-bit" apps, which don't take full advantage of a Mac computer's power.
Instead, macOS Catalina will only support "64-bit" apps that can make better use of your computer's power.
For most people and the apps they use, this shouldn't pose much of a problem. But just in case, there's a quick and easy way to see if your apps are already 64-bit in macOS Mojave.
In some cases, you might find an app isn't 64-bit, but that doesn't mean that it's outright incompatible with macOS Catalina — the app's developers might have a 64-bit version of their app ready for macOS Catalina, especially if they're recognized by Apple.
Here's how to quickly and easily check which apps may or may not work with macOS Catalina:
First, click the Apple icon on the top left, then click "About this Mac."
In the Window that pops up, click "System Report."
In the System Report window, scroll down on the left until you find "Applications" and click on it.
It helps if you resize the Applications section in System Report to make it easier to see which apps are compatible with macOS Catalina.
On the right, you'll see a column named "64-bit (Intel)." If you see an app that says "No," you may run into some issues. You can click the column tab to sort the apps so you can see all the no's in one group.
For apps that show "No," check the column named "Obtained from." If the app says it's from "unknown," it may not work in macOS Catalina. Those that are "obtained from" Apple, the Mac App Store, or an "Identified Developer" are much more likely to be available in 64-bit for macOS Catalina, even if the app is 32-bit on macOS Mojave.
While you're installing macOS Catalina, your Mac will show you which recently used apps aren't compatible with Catalina.