Not that I have anything against Macs or Mac users, but I would think porting PHPEd to MacOS would be a pretty big task. I honestly think the development resources are better spent working on the existing Windows version. That's where the biggest market is, correct? If not Nusphere just happen to have ten extra programmers sitting around with nothing to do, that is
I guess it is easier with a project like Komodo that uses a platform independent GUI kit (Mozilla/XUL) and a separately developed editor component (Scintilla). But even so it took Active State several years to get a Mac version ready.