RMCTools does not run natively a MAC. However, RMCTools can run on a Mac with the help of other software programs. Here are some options:
Run VMWare’s Fusion product to create a virtual maching with a Windows operating system. This requires purchasing both Fusion and Windows.
Other Virtual Machine products
Run another virtual machine product such as Parallels or VirtualBox. This still requires a Windows operating system.
http://www.codeweavers.com/products/cxmac/. This does not support USB, but does support Ethernet and serial.
Wine’s guide to installing on the mac: http://wiki.winehq.org/MacOSX/Installing. This does not support USB, but does support Ethernet and serial.