[MaxPower]

http://developer.apple.com/techpubs/macosx/Cocoa/TasksAndConcept s/ProgrammingTopics/OperatingSystem/index.html

Click on either 'NSSystem' or 'NSProcessInfo'. Both will return the operating system type on which the code is running. So is this a holdover of OpenStep-->YellowBox days in which there was going to be a runtime environment for multiple operating systems? I was thinking that if it was they would have removed it from the site when they did a global replace of 'YellowBox' with 'Cocoa'. Your thoughts?

old links that reference YellowBox
Link to Apples Unified Develoment Strategy Press Release from 1997

Link to page on New Dev Platform code-named 'Yellow Box' (Jul 97)

[bewebste]

Yes, these methods have been around since the OpenStep days, when it ran on NeXTStep, Windows, and Solaris, and occasionally developers would have to know which OS they were on to customize specific things to the conventions of the OS their program was running on. There's not really any reason to take it out, and I wouldn't interpret it's continued presence as an indication that Apple plans to port Cocoa to Windows or anything; they're just leaving the door open "just in case".