How about...
... open source it, and we'll port it for you. FOR FREE.
Australia's Mac OS users may once again have native access to the Australian Taxation office's (ATO's) e-tax app, after the agency asked Capgemini to rummage through code for the Windows version to see if a Mac port is possible. An ATO spokesperson told Intermedium “The ATO is committed to providing a sustainable outcome for …
I know what prompted this... as of Delphi XE2 released in September last year, Delphi now supports cross-compilation to OS X (and iOS).
Trouble is, if they are thinking this means they can take their Windows code and now compile it for OS X, they are going to be disappointed. Developing a cross-platform GUI in Delphi requires the use of "FireMonkey" - including an all new GUI toolkit built on a cross-platform OpenGL/DirectX general purpose GFX framework.
There are no "native" controls in FireMonkey. So on the plus side, a FireMonkey app looks the same (subject to theme or styling) on every OS you compile the app for. On the down side, a FireMonkey app looks the same (subject to theme or styling) on every OS you compile the app for. It is difficult to take advantage of platform specific features in the FireMonkey world, and up until very recently there wasn't even any printer support.
I just wish someone had offered to pay me a metric skip load of tax payers money to tell them all this. Hey ho.