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Editorial Team
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Asked: 2026-05-25T06:42:11+00:00

I’m just starting out with Cocoa development in Xcode, doing the hello world example.

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I’m just starting out with Cocoa development in Xcode, doing the hello world example. I’m up to step 6 of the section “runtime debugging“, which is

Using the Step Over button in the debugger toolbar, begin stepping through the code. As each line of code executes, you can examine the program’s state. The value of a variable is sometimes drawn in red to indicate that the value was modified in the last step.
Notice that the debugger pauses before executing the indicated line. After each pause, you can add additional breakpoints or choose Debug > Restart to terminate the application and start a new debugging session.

now what I’ve been pulling my hair out for over the last hour is the fact that this debugger will only show me assembly code. I can manually select my source code file, but as soon as I click “Step over” I’m right back in assembler view. I can’t for the life of me figure out how to turn the assembler off, and make it show me my source code!

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1 Answer

  1. Editorial Team

    I know this article is a hundred years old, but in case anyone is wondering how to address this issue in more recent Xcode versions (as opposed to Xcode 3), you’ll find the appropriate setting labeled Always Show Disassembly under Debug>Debug Workflow in Xcode 6 and up. Ensure the option is NOT checked.

    This was driving me crazy, too.

    NOTE: The information above is still valid for Xcode 15+. I’ve applied updates to this answer as new versions of Xcode have been released. Fortunately, the option has remained unchanged since Xcode 6 (so far).

    In Xcode 5, the option was labeled Show Disassembly When Debugging under Debug>Debug Workflow. Ensure that "Show Disassembly When Debugging" is unchecked.

    Back in Xcode 4, the Show Disassembly When Debugging setting was found under Product>Debug Workflow. Again, ensure that the option remains unchecked.

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