I don't have a particular project in mind, I am just interested in people's opinions of these two development platforms. I have used RealBasic in the pas witht v5 and found the language easy to learn. Being able to deploy on Mac and Windows is a huge plus. The large file sizes that Real produces doesn't bother me in the era half terabyte drives and broadband connections. Code Performance, especially snappiness(tm) of the interface is very important. Stability is another area of concern for me with RealBasic. I don't want to spend half my time doing workarounds. Xcode with Cocoa is free plus it gives me access to all of OSX's goodies. But the language looks very complicated to learn let alone the frameworks. so what are people's experiences and opinions?