I would suspect that they would not be using Pascal (or Delphi which is an object oriented extension of Pascal) ... it is pretty rare these days. But I looked, and there is a 64-bit version of TurboPascal, which I suspect you would need for both the new PCs and the Intel Macs. So possibly.
But Apple has pushed Objective C -- a sort of mix of SmallTalk and C++ which is ostensibly open source, but really only used by Apple (I think it was promoted by Alan Kaye, the author of SmallTalk). And the primary .NET language on Windows in C#. Both have great interactive development environments, and both can share 99% of the code (which would be a simplified C++). This is definitely what I would want as a programmer. I could be wrong, reflecting my own biases, but this would be the most sensible way to build the product across platforms. It might explain why there isn't a Linux version as well, as you wouldn't automatically have access to all of the class libraries of Apple and Microsoft.
Chris