Apple officially released the new version last weekmacOS 10.15 CatalinaDue to the full adoption of a 64-bit architecture, many applications designed for 32-bit architecture will not run smoothly under the new operating system environment. According to the current documentation of Apple in macOS 10.15 Catalina, several applications are confirmed to be incompatible with the new operating system, including Transmit, which is often used to download files, as well as older versions of Parallels, VMWare Fusion, and Creative Cloud.
macOS 10.15 Catalina is Apple's last operating system to fully transition to a 64-bit architecture. Compared to previous 32-bit architectures, 64-bit applications can access more memory capacity and other resources, resulting in better overall computing efficiency and power consumption.
The full switch to a 64-bit architecture is partly expected to coincide with the new Mac Catalyst design added to macOS 10.15 Catalina. This will allow developers to use resources provided by Apple to more quickly port apps and services on the iPad to the macOS operating system, thereby increasing the usage of applications and services. At the same time, it will also increase the usability of Mac devices for Apple.
According to the list stored by the developer in the IncompatibleAppsList.bundle file of macOS 10.15 Catalina, macOS 10.15 Catalina will confirm the compatibility of applications installed on the user's Mac device after installation, and will create a list to inform the user which applications are incompatible.
For users who have only started using Mac in recent years, the actual impact may not be that big. After all, Apple has gradually required developers to build applications with 64-bit or higher architecture in recent years. Therefore, except for applications that were previously designed with only 32-bit architecture, there will be compatibility issues. Currently, applications downloaded through the Mac App Store will basically not have execution compatibility issues.
