# Weird message on Mac OS High Sierra (file choosing)

**URL:** <https://forum.juce.com/t/weird-message-on-mac-os-high-sierra-file-choosing/27071>\
**Category:** General JUCE discussion\
**Created:** [April 3, 2018, 7:55pm UTC](https://forum.juce.com/t/weird-message-on-mac-os-high-sierra-file-choosing/27071 "2018-04-03T19:55:33Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Newbie](https://avatars.discourse-cdn.com/v4/letter/n/dc4da7/32.png) [@Newbie](https://forum.juce.com/u/Newbie)\
**Post date:** [April 3, 2018, 7:55pm UTC](https://forum.juce.com/t/weird-message-on-mac-os-high-sierra-file-choosing/27071/1 "2018-04-03T19:55:33Z")

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Hi, today I have upgraded my mac OS to High Sierra. Upon file choosing (FileChooser) I got the following message:  
objc[3613]: Class FIFinderSyncExtensionHost is implemented in both /System/Library/PrivateFrameworks/FinderKit.framework/Versions/A/FinderKit (0x7fff925f0c90) and /System/Library/PrivateFrameworks/FileProvider.framework/OverrideBundles/FinderSyncCollaborationFileProviderOverride.bundle/Contents/MacOS/FinderSyncCollaborationFileProviderOverride (0x10b755cd8). One of the two will be used. Which one is undefined.

File chooser works ok, however.  
Has anybody experienced the same?  
What’s the remedy?

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**Author:** ![jonathonracz](https://avatars.discourse-cdn.com/v4/letter/j/da6949/32.png) [@jonathonracz](https://forum.juce.com/u/jonathonracz)\
**Post date:** [April 3, 2018, 8:14pm UTC](https://forum.juce.com/t/weird-message-on-mac-os-high-sierra-file-choosing/27071/2 "2018-04-03T20:14:40Z")

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I’m getting this as well. I haven’t noticed any problems occurring due to it though (like the month 13 out of bounds bug).

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**Author:** ![fr810](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/fr810/32/841_2.png) [@fr810](https://forum.juce.com/u/fr810)\
**Post date:** [April 23, 2018, 11:17am UTC](https://forum.juce.com/t/weird-message-on-mac-os-high-sierra-file-choosing/27071/3 "2018-04-23T11:17:33Z")

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> <https://stackoverflow.com/questions/46999695/class-fifindersyncextensionhost-is-implemented-in-both-warning-in-xcode-si>