32-bit apps and games are usually developed for old operating systems, that’s why they have some limits, related to the architecture of systems that they were designed for. A 32-bit program can’t use more than 4GB and depending on the operating system the actual limit may be 2GB or lower. macOS Catalina was the first Mac operating system, that didn’t support 32-bit apps. If you will try to run a 32-bit application on Catalina, or Big Sur it will simply not start. If you wish to avoid these troubles, the most simple is to choose 64-bit native software for Mac, instead of using old apps. Leading software developers usually adapt their software to new hardware as quickly as possible, so sometimes you need only update the version of the app. But millions of users like to use old trusted, and usual programs, such as Microsoft Office, Adobe CS 5, etc. The price of the software package may be an additional reason. Anyway, if you still need to run the 32-bit app on macOS Catalina, you can read our guide below.
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