I've been developing for Symbian S60 3rd Edition since last year using Carbide.c++ under Windows. THe problem is that I moved to Mac OS X this year(bought a Macbook Pro) and when I was going to download Carbide.c++, I saw that it's Windows-only, because of the Requirements:
Microsoft Windows XP Professional Service Pack 2 or Microsoft Windows Vista (32-bit).
1 GB of RAM.
700 MB of free disk space for Carbide.c++.
1.8-GHz processor; x86 architecture.
ActiveState ActivePerl-5.6.1.635.
At least one Symbian OS platform SDK.
1,024 x 768-pixel screen capable of displaying 16-bit colour.
But there are any alternatives for Mac OS X?
As of now, Mac is not officially supported if you want to develop apps for Symbian (either using QT or without QT). The problem is that all the tools needed to create the final binary run only on Windows (abld).
This page on Forum Nokia makes it pretty clear:
Qt for Symbian development requirements In order to develop Qt applications for Symbian devices you'll need the following setup:
You can use remote compiler from mac via qt. http://labs.qt.nokia.com/2011/01/20/qt-sdk-1-1-technology-preview-released/