yes, it will recognise properly and use the cpus well, 10.5 or better. xcode is great. nicely configurable. i needed some adjustment from emacs to xcode, never

yes, it will recognise properly and use the cpus well, 10.5 or better. xcode is great. nicely configurable. i needed some adjustment from emacs to xcode, never looked back to emacs on mac. builds are stable. occasionally i had too fiddle with libraries when used 3rd party stuff. macports is your friend. dev(objc/c/c++/qt4/java/python) on mac is smooth, less clutter, good docs, easy access.