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This has been covered many times. https://duckduckgo.com/?q=setup%20mac%20for%20development https://duckduckgo.com/?q=setup%20mac%20for%20development In the future if you want better help for a question like this, you should state whether you're familiar with UNIX or not, what type of development you do, what stack you develop for, what languages, what you have already done. etc.