# \[X\] Mixed Case on Mac OS Sierra not working : "file already exists"

**URL:** <https://community.mp3tag.de/t/x-mixed-case-on-mac-os-sierra-not-working-file-already-exists/19115>\
**Category:** No Bugs\
**Created:** [July 3, 2017, 6:07pm UTC](https://community.mp3tag.de/t/x-mixed-case-on-mac-os-sierra-not-working-file-already-exists/19115 "2017-07-03T18:07:57Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![thfrere](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/t/34f0e0/32.png) [@thfrere](https://community.mp3tag.de/u/thfrere)\
**Post date:** [July 3, 2017, 6:07pm UTC](https://community.mp3tag.de/t/x-mixed-case-on-mac-os-sierra-not-working-file-already-exists/19115/1 "2017-07-03T18:07:57Z")

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Hi,  
Please take a look at the screen shot

 ![](https://community.mp3tag.de/uploads/default/original/2X/4/452c694464d976e967d3d5c1f44ca08acbbaae97.jpg)  
  
This happens when using Quick Actions, choosing \_allfiles, Mixed Case.  
Error message : cannot be renamed, file already exists.  
Is it a bug or am I doing something wrong ?  
thanks guys  
v2.82 on Mac OS Sierra

 ![](https://community.mp3tag.de/uploads/default/original/2X/4/452c694464d976e967d3d5c1f44ca08acbbaae97.jpg)

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**Author:** ![thfrere](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/t/34f0e0/32.png) [@thfrere](https://community.mp3tag.de/u/thfrere)\
**Post date:** [July 5, 2017, 5:35pm UTC](https://community.mp3tag.de/t/x-mixed-case-on-mac-os-sierra-not-working-file-already-exists/19115/2 "2017-07-05T17:35:52Z")

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Hi guys, any idea on this please ?

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**Author:** ![ryerman](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ryerman/32/5285_2.png) [@ryerman](https://community.mp3tag.de/u/ryerman)\
**Post date:** [July 5, 2017, 6:26pm UTC](https://community.mp3tag.de/t/x-mixed-case-on-mac-os-sierra-not-working-file-already-exists/19115/3 "2017-07-05T18:26:02Z")

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Maybe the file system is case insensitive.  
[https://developer.apple.com/library/content/documentation/FileManagement/Conceptual/APFS\_Guide/FAQ/FAQ.html ://https://developer.apple.com/library...e/FAQ/FAQ.html ://https://developer.apple.com/library...e/FAQ/FAQ.html](https://developer.apple.com/library/content/documentation/FileManagement/Conceptual/APFS_Guide/FAQ/FAQ.html)

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**Author:** ![ohrenkino](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ohrenkino/32/4843_2.png) [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)\
**Post date:** [July 6, 2017, 7:03am UTC](https://community.mp3tag.de/t/x-mixed-case-on-mac-os-sierra-not-working-file-already-exists/19115/4 "2017-07-06T07:03:10Z")

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> [@thfrere](#):
>
> ... or am I doing something wrong ?...v2.82 on Mac OS Sierra

MP3tag is still a Windows application.  
So somewhere, there is an emulator running. And NTFS (Windows) is not case-sensitive.  
To rename a file you cannot only change the case of a letter, you really have to rename it to a new filename (like add an underscore at the end), then apply the new case, then remove the underscore.  
No MP3tag bug but due to your environment.

in [Upper case](https://community.mp3tag.de/t/19132/9)  
you find an example how to rename files in principle. Perhaps the function $caps() is better for you.

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**Author:** ![Florian](https://community.mp3tag.de/user_avatar/community.mp3tag.de/florian/32/5759_2.png) [@Florian](https://community.mp3tag.de/u/Florian)\
**Post date:** [December 28, 2018, 6:51pm UTC](https://community.mp3tag.de/t/x-mixed-case-on-mac-os-sierra-not-working-file-already-exists/19115/5 "2018-12-28T18:51:40Z")

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