Programming in C / C++ is your standard weapon for coding everything in MacOS. In fact, it was the "standard language" in Mac development throughout the 90s. While it may seem intimidating at first, it's not as hard as it sounds as the Mac provides literally a great Toolbox to support your programming efforts.
Unless you've been programming with Think C and/or MPW in the early 90s and feel nostalgic, I'd strongly recommend using CodeWarrior as the IDE of choice.
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