If you got a message like this from Apple reviewers:
While a future version of REAL Studio will contain an install name that does not trigger this false positive, a temporary solution is to manually change the install name via install_name_tool:
The application links against , which is missing.
Thanks to Joe Ranieri who posted this on the REAL Software forums.
install_name_tool -id '@executable_path/rbframework.dylib' '/My Application.app/Contents/MacOS/rbframework.dylib'
There is a blog post from Joe about it: Mac App Store rejections due to HXRuntime