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Editorial Team
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Asked: 2026-06-02T02:30:32+00:00

Since the iOS simulator is a simulator, why do I need to build specifically

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Since the iOS simulator is a simulator, why do I need to build specifically for it? Isn’t the point of a simulator that it runs the real code in some sort of VM/sandbox?

So what are the actual differences in how building for device/simulator works, and how the resultant built apps differ?

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1 Answer

  1. Editorial Team

    An application running natively on an iOS device is an ARM program.
    However, an application running in the iOS Simulator is an ordinary
    32-bit (i386 architecture) Mac OS X program. In other words, the
    Simulator doesn’t simulate an iOS device down to the hardware level.
    It provides a faithful copy of the iOS environment, reimplemented to
    run natively on the Mac.

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