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Home / Tips and Tricks / MacOS Catalina kills 32-bit apps. This means for you:

MacOS Catalina kills 32-bit apps. This means for you:



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Check which apps are not working before you upgrade to MacOS Catalina.


Sarah Tew / CNET

MacOS Catalina is here and with the update comes the transition from 32-bit apps to 64-bit apps. Overall, this is a good thing, as apps run faster and access more memory. The move to using only 64-bit apps in MacOS Catalina has been in the making for years, and Apple is helping developers migrate their 32-bit apps to 64-bit. As part of the transition, Apple began last year to use all apps in the App Store in 64-bit format.

If you regularly update your apps or just download them from the App Store, this is most likely okay. However, if you're stuck with an old favorite that the developer does not want to update – like Microsoft Office 11 for Mac – you'll need to decide if you want to switch to Catalina and lose access to the app or skip updating. Update the old software , and continue using it.

Although you can pass on Catalina, we recommend updating your operating system so that you do not lose Apple's security patches.

Before you switch to the new MacOS, learn how to check which of your apps are not suitable for Catalina.

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Apple

How to Search for 32-Bit Apps on Your System

1. Click on the Apple icon in the upper left corner of your screen.

2. Select About This Mac .

3. Click System Report .

4. Scroll to the Software section and click Applications .

5. Right you can see a list of apps and a column labeled 64-bit (Intel) . If one of these apps in this column contains a No it means that they are not 64-bit apps. You must update it or find a replacement before you receive the MacOS Catalina update.

Need more information? Learn how to check if your Mac works with Apple's MacOS Catalina Update this fall.

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Originally released earlier this month. Updated to remove an incorrect reference to the number of apps that are not compatible with MacOS Catalina.


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