Porting app to Mac – mash native services
Scott Stevenson of Thecacao has a great point differentiating cross platform applications and native mac applications, another basic difference in the user experience between ported apps and native Mac apps is that Mac native applications enjoy core services such as Dictionary-Thesaurus, Speller, etc.. I rely on those services, and the consistency in keyboard shortcuts they bring to my working environment.For example take a look at Photoshop CS3 beta for Mac – it has a built in speller, the interface is primitive and not really attractive compared to the advanced docked palettes (see cap), surely less intuitive than the OS native speller.
confusing interface – what was checked? is that correct?
primitive interface – so many buttons, the default button is not aplying the change!
the good familiar mac dictionary – even look nice..
Skype provides the native mac Speller and Dictionary services, Firefox (and Camino) has no speller nor dictionary 
Applications well ported to Mac should respect user habits, unless they really upgrade or improve the native OS service – they should not confuse the user by not providing those services or providing poor alternatives, for me it is not that different than the ability to copy & paste from one app to another.
