Compiling C++ for mac

[Dr Zoidberg]

I am slowly putting together a program in C++ useing builder, it is running fine at each stage under windows,

What i want to do is also compile a version to run on mac,

am i going to be able to compile a mac version on a windows PC? if so what software do i need?
if not i guess i need a mac to do it on,

 

[Dr Zoidberg]

Im not useing linux, and yes it is borland builder,
Looks like i will have to find my self a mac, copy/paste everything over then look at what needs altering.
Thanks