Simulator Limitations
Each release of the Macintosh-based iOS Simulator continues to improve on previous technology. That said, there are real limitations you must take into account. From software compatibility to hardware, the simulator approximates but does not equal actual device performance.
The simulator uses many Macintosh frameworks and libraries, offering features that are not actually present on the iPhone or other iOS devices. Applications that appear to be completely operational and fully debugged on the simulator might flake out or crash on a device itself due to memory or performance limitations on iOS hardware. Even the smallest Mac nowadays comes with 4GB of RAM, whereas the third-generation iPad has only 1GB of RAM. Instruction ...
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