In the fall, all 32-bit programs stop working in MacOS

To check which apps are affected.

In the fall, all 32-bit programs stop working in MacOS
In the fall, all 32-bit programs stop working in MacOS.



As we announced earlier, Apple throws out its "Widgets," or widgets, from MacOS when the new Catalina is ready from the fall. However, far more significant consequences will come when Apple sends all so-called 32-bit programs to the door.

Today's MacOS Mojave is the latest operating system with support for 32-bit apps. Starting with MacOS Catalina, only programs built on the newer and more powerful 64-bit architecture will work.

Apple has demanded that all new apps added to the App Store from early 2018 and later support 64-bit architecture.


You may have missed the warnings
Apple has shown signs to all Mac users who will be affected by the change since April. But only if they have already had the latest update to Mojave installed.

The message (in English) looks like this:

The word only pops up once every 30 days, and only if you have opened a program that your Mac detects as 32-bit.

So, if it takes a long time between each time, you use some of your programs, or you don't have the latest update to MacOS Mojave installed, you should do a manual check for 32-bit applications on your Mac. If you upgrade to MacOS Catalina this fall, it can be difficult or impossible to re-open these programs.

How to find old 32-bit programs
To see if you have any 32-bit applications on your Mac, follow this simple recipe:


  1. Open the  menu at the top left and select "About this machine."
  2. Open "System Report"
  3. Select "Applications," which you will find under the software category.
  4. Now you can click on the far right column where it says "64-bit" to sort all your programs according to which architecture they support, 32-bit or 64-bit.

Do this if you have 32-bit programs.

If you find that you have some 32-bit apps that you rely on installed on your MACHINE, you have two choices.


  • You can't stop updating to new MacOS Catalina in the fall.
  • You can see if the developer of the program has an update to it

Some popular applications that are not adequately compatible with 64-bit exclusive operating systems are Adobe's CS5 package and Microsoft Office 2011. Here you will have to upgrade to newer versions.

However, it is not sure that you have to bring all the 32-bit programs you get into the list. These can be programs or components for applications that you no longer need any longer.

64-bit for better performance

All Macs that can be upgraded to MacOS Catalina are equipped with 64-bit processors and thus support 64-bit apps. The transition from 32-bit to 64-bit apps started over ten years ago, so no one can just say that Apple hurries here.

The benefits of 64-bit apps are many. They have access to many times as much system memory as 32-bit apps and can have better performance. Also, Apple's useful Metal API, which is responsible for all animations and graphics in MacOS, only works in 64-bit apps.
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