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Editorial Team
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Asked: 2026-05-16T07:50:52+00:00

I have a very simple .NET commandline application that I want to port to

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I have a very simple .NET commandline application that I want to port to OS X.
I can run it with “mono app.exe”
However, the destination machines won’t have mono installed.
So, I wanted to bundle mono inside the app.

In order to do this, I used mkbundle2:

mkbundle2 -o bundledapp.exe app.exe --deps

This works without errors, output:

OS is: Darwin
Sources: 1 Auto-dependencies: True
  embedding: /Users/kclement/Projects/app/build/app.exe
  embedding: /Library/Frameworks/Mono.framework/Versions/2.6.1/lib/mono/2.0/mscorlib.dll
  embedding: /Library/Frameworks/Mono.framework/Versions/2.6.1/lib/mono/gac/System/2.0.0.0__b77a5c561934e089/System.dll
  embedding: /Library/Frameworks/Mono.framework/Versions/2.6.1/lib/mono/gac/System.Configuration/2.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
  embedding: /Library/Frameworks/Mono.framework/Versions/2.6.1/lib/mono/gac/System.Xml/2.0.0.0__b77a5c561934e089/System.Xml.dll
  embedding: /Library/Frameworks/Mono.framework/Versions/2.6.1/lib/mono/gac/System.Security/2.0.0.0__b03f5f7f11d50a3a/System.Security.dll
  embedding: /Library/Frameworks/Mono.framework/Versions/2.6.1/lib/mono/gac/Mono.Security/2.0.0.0__0738eb9f132ed756/Mono.Security.dll
Compiling:
as -arch i386 -o temp.o temp.s 
cc -g -o bundledapp.exe -Wall temp.c `pkg-config --cflags --libs mono`  temp.o
Done

I can execute this on the build machine. When I execute on a machine without mono however, it won’t run.

Output:

dyld: Library not loaded: /Library/Frameworks/Mono.framework/Versions/2.6.1/lib/libmono.0.dylib
  Referenced from: /Users/kristof/./bundledapp.exe
  Reason: image not found
Trace/BPT trap

What am I missing? How do I include the actual mono runtime?

EDIT:
I also tried adding the –static flag.
That gives my app another license however, which I’m not sure I want.
I then no longer complains about libmono, but about libgthread-2.0.0.dylib

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1 Answer

  1. Editorial Team

    So, the problem is that mkbundle links to some file that reside on my mac, where I expected it to bundle them. You can clearly see that by looking up the linked resources with the command:

    otool -L ./BundledApp

    (where bundledApp is the output of mkbundle2)

    In order to fix it, I ended up using the mkbundle nant-tasks from the monobjc project:
    http://www.monobjc.net/index.php?page=mkbundle-task

    I think they are pretty much an automated version of what I found here:
    http://code.google.com/p/cocoa-sharp-dev/wiki/RedistributableAppWithoutInstallingMono
    But that gave me exceptions.

    The Monobjc nant task works without any issues, and is by far the easiest solution. I still have multiple files but that’s ok, at least it works now.

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