Apple began transitioning to 64-bit hardware and software technology for Mac over a decade ago, and all modern Macs now include powerful 64-bit processors that can run advanced 64-bit apps. These apps can access dramatically more memory, enable faster system performance, and take advantage of technologies that define today's Mac experience.
Apple has been working with developers to transition their apps, and in 2018 Apple informed them that macOS Mojave would be the last version of macOS to run 32-bit apps. Starting with macOS Catalina, 32-bit apps are no longer compatible with macOS.
If you get an alert about a 32-bit app
You will see one of these alerts when attempting to open a 32-bit app:
[app name] needs to be updated.
The developer of this app needs to update it to work with this version of macOS. Contact the developer for more information.
[app name] is not optimized for your Mac and needs to be updated.
This app will not work with future versions of macOS and needs to be updated to improve compatibility. Contact the developer for more information.
Why Does Macos Catalina Not Support 32 Bit
How to Run 32-Bit Apps in macOS Catalina. Apple's latest version of macOS, Catalina, officially ditches 32-bit app support, but you can still run the software you need by following these steps. Apple has been working with developers to transition their apps, and in 2018 Apple informed them that macOS Mojave would be the last version of macOS to run 32-bit apps. Starting with macOS Catalina, 32-bit apps are no longer compatible with macOS. One of the major changes in macOS Catalina is that software must be 64-bit in order to run. 32-bit apps will not run on Catalina. (32- and 64-bit have to do with the linear address space an apps. I finally updated my macOS to Catalina recently and did all the steps to update osu to Catalina supported one. Everything is working perfectly, except I can't open the osu beatmaps and add new songs. Whenever I try to open the beat maps I downloaded on osu, it says 'There's no Windows program configured to open this type of file'.(I will attach.
When installing macOS, you may see a list of recently used apps that are 32-bit. You can review this list before deciding to continue installation. You may also see a prohibitory symbol over the icon of each 32-bit app in the Finder, letting you know that the app will not open.
Macos Catalina 32 Bit Support Windows 10
For all 32-bit apps, please contact the developer of the app to learn whether an updated version of their software is available or planned.