# Mac build error "Copy() called does not exist"

**URL:** <https://qa.fmod.com/t/mac-build-error-copy-called-does-not-exist/17221>\
**Category:** Unity\
**Tags:** mac\
**Created:** [May 18, 2021, 10:22pm UTC](https://qa.fmod.com/t/mac-build-error-copy-called-does-not-exist/17221 "2021-05-18T22:22:03Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![huntersonstudio](https://avatars.discourse-cdn.com/v4/letter/h/f17d59/32.png) [@huntersonstudio](https://qa.fmod.com/u/huntersonstudio)\
**Post date:** [May 18, 2021, 10:22pm UTC](https://qa.fmod.com/t/mac-build-error-copy-called-does-not-exist/17221/1 "2021-05-18T22:22:03Z")

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Note: I am developing my game on Windows and it builds with IL2CPP with no errors.

Since our composer uses Mac, I wanted to also build the game on Mac, so he could also play it. Unfortunately, it gives me a weird build error and I’m not sure if it is related to FMOD or to Unity.

System.ArgumentException: Copy() calles on path that doesnt exist: “the windows unity project path”/Temp/fmod\_register\_static\_plugins.cpp

If other people have had the same error, please let me know how to fix it. I tried a bunch of stuff with fmod, like saving and building to a new folder. But that didn’t work.

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**Author:** ![huntersonstudio](https://avatars.discourse-cdn.com/v4/letter/h/f17d59/32.png) [@huntersonstudio](https://qa.fmod.com/u/huntersonstudio)\
**Post date:** [May 19, 2021, 11:03am UTC](https://qa.fmod.com/t/mac-build-error-copy-called-does-not-exist/17221/2 "2021-05-19T11:03:55Z")

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I have tried saving and building the fmod project to a new folder, but that didn’t work.  
I have deleted the Library folder so Unity builds it again. That didn’t work either

When I start the Unity project, it even says:  
FMOD: Removed temporary file Assets/Plugins/FMOD/Cache/fmod\_register\_static\_plugins.cpp.  
That is the same file it tries to read (but not in a windows path)

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<div class="post-metadata">

**Author:** ![huntersonstudio](https://avatars.discourse-cdn.com/v4/letter/h/f17d59/32.png) [@huntersonstudio](https://qa.fmod.com/u/huntersonstudio)\
**Post date:** [May 19, 2021, 11:42am UTC](https://qa.fmod.com/t/mac-build-error-copy-called-does-not-exist/17221/3 "2021-05-19T11:42:44Z")

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When I create a new Unity project on mac and add the FMOD plugin and even add the same FMOD project, it builds with no problem.  
I also deleted all FMOD files from the project and imported new files … still no luck

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<div class="post-metadata">

**Author:** ![huntersonstudio](https://avatars.discourse-cdn.com/v4/letter/h/f17d59/32.png) [@huntersonstudio](https://qa.fmod.com/u/huntersonstudio)\
**Post date:** [May 19, 2021, 12:46pm UTC](https://qa.fmod.com/t/mac-build-error-copy-called-does-not-exist/17221/4 "2021-05-19T12:46:54Z")

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I got it to build by creating a completely new Unity project, importing everything from the old project and building that.