On some Mac systems, seemingly randomly, the patch installer is unable to find the location of the CM Red Thunder app. This is not specific to any OS X version and seems to affect various systems randomly. If this happens, then during installation you may not be able to specify an installation location, and the patch will abort.
The solution is to copy the existing game into the following place:
> /Applications/CM Red Thunder/CM Red Thunder
In other words, the game needs to be inside a folder called "CM Red Thunder" inside the Applications directory. It also needs to be named "CM Red Thunder". Please rename/move the application there before running the patch, and it should work.
NOTE: if you have extensions display turned on, the application name must be CM Red Thunder.app