On PC you can explore a drive i.e C:\ etc from code but how to check for available drives and open the equality for explorer on Mac? I suppose it's called 'Finder' in El Capitain. Personally I own a Macbook, but I'm not that familiar with it. I just use it to be able to test my developed software in B4J on it and use it as a Mac builder for B4i. Since I want to implement the feature to list available drives and explore one of them, I want it to work on both PC and Mac. It will be most useful to make it work on both platforms.