Unfortunately, the application is developed to run only on Windows platforms and the only solution to install it on your computer is to use third-party software. I suggest you try CrossOver. It is an application developed by CodeWeavers that allows you to install and run Windows program on your Mac without requiring a Windows OS license. Also, you can use Parallels Desktop, VMware Fusion or VirtualBox. These tools let you run Windows or other operating system within Mac OS X.
Note: If you no longer have the RCA easyRip installation package, you can download it from the official web page. Select your model number from the drop down list and download the software.