This question already has an answer here:
Where can I get a legal, free copy of NXT-G for mac?
I lost my disk when I bought my NXT, and I need to get a new program.
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marked as duplicate by Zhaph - Ben Duguid♦ Jul 25 '14 at 13:42
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
5
LEGO has recenlty made this easier to find:
http://www.lego.com/en-us/mindstorms/downloads/software/nxt-software/
