To understand the current situation, we have to look back at the late 2000s. During the PowerPC era and the early Intel transition, Mac gaming was often handled through "wrappers"—technologies that allowed Windows games to run on macOS without a full native port.
Users install the Windows version of the game (from Steam or EA) inside a "bottle." command amp- conquer red alert 3 for mac
The Cider wrapper often resulted in lower frame rates than the Windows native version. To understand the current situation, we have to
EA abandoned the port. They never updated it to 64-bit. Consequently, digital stores stopped selling it. If you find a "Mac key" for Red Alert 3 today, it is likely a scam or a relic that will not activate. EA abandoned the port
PortingKit uses the same underlying technology (Wine) but wraps it in a user-friendly interface. It hosts pre-made "wrappers" for older games.