Odd console output with 2016r4 release

I noticed when I compile my apps with the latest Xojo 2016r4 , it always throws the below issues:

Jan 3 15:00:43 Christophes-MacBook-Pro Xojo[481]: objc[481]: Class XOJBevelButton is implemented in both /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Frameworks/AppearancePakCocoa.dylib (0x3ce5000) and /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Resources/Internal Plugins/RBAppearancePak.xojo_plugin/Appearance Pak/Build Resources/Mac Cocoa/AppearancePakCocoa.dylib (0x1392d000). One of the two will be used. Which one is undefined.
Jan 3 15:00:43 Christophes-MacBook-Pro Xojo[481]: objc[481]: Class XOJImageWell is implemented in both /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Frameworks/AppearancePakCocoa.dylib (0x3ce5030) and /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Resources/Internal Plugins/RBAppearancePak.xojo_plugin/Appearance Pak/Build Resources/Mac Cocoa/AppearancePakCocoa.dylib (0x1392d030). One of the two will be used. Which one is undefined.
Jan 3 15:00:43 Christophes-MacBook-Pro Xojo[481]: objc[481]: Class XOJChasingArrows is implemented in both /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Frameworks/AppearancePakCocoa.dylib (0x3ce5060) and /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Resources/Internal Plugins/RBAppearancePak.xojo_plugin/Appearance Pak/Build Resources/Mac Cocoa/AppearancePakCocoa.dylib (0x1392d060). One of the two will be used. Which one is undefined.
Jan 3 15:00:43 Christophes-MacBook-Pro Xojo[481]: objc[481]: Class XOJDisclosureTriangle is implemented in both /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Frameworks/AppearancePakCocoa.dylib (0x3ce5090) and /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Resources/Internal Plugins/RBAppearancePak.xojo_plugin/Appearance Pak/Build Resources/Mac Cocoa/AppearancePakCocoa.dylib (0x1392d090). One of the two will be used. Which one is undefined.
Jan 3 15:00:43 Christophes-MacBook-Pro Xojo[481]: objc[481]: Class XOJLittleArrows is implemented in both /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Frameworks/AppearancePakCocoa.dylib (0x3ce50c0) and /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Resources/Internal Plugins/RBAppearancePak.xojo_plugin/Appearance Pak/Build Resources/Mac Cocoa/AppearancePakCocoa.dylib (0x1392d0c0). One of the two will be used. Which one is undefined.
Jan 3 15:00:43 Christophes-MacBook-Pro Xojo[481]: objc[481]: Class XOJSeparator is implemented in both /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Frameworks/AppearancePakCocoa.dylib (0x3ce50f0) and /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Resources/Internal Plugins/RBAppearancePak.xojo_plugin/Appearance Pak/Build Resources/Mac Cocoa/AppearancePakCocoa.dylib (0x1392d0f0). One of the two will be used. Which one is undefined.
Jan 3 15:00:43 Christophes-MacBook-Pro Xojo[481]: objc[481]: Class XOJSegmentedControl is implemented in both /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Frameworks/GUIKitCocoa.dylib (0x3cf0000) and /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Resources/Internal Plugins/RBGUIKit.xojo_plugin/GUIKit/Build Resources/Mac Cocoa/GUIKitCocoa.dylib (0x13946000). One of the two will be used. Which one is undefined.
Jan 3 15:00:43 Christophes-MacBook-Pro Xojo[481]: objc[481]: Class XOJGUIKit_ActionTarget is implemented in both /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Frameworks/GUIKitCocoa.dylib (0x3cf0030) and /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Resources/Internal Plugins/RBGUIKit.xojo_plugin/GUIKit/Build Resources/Mac Cocoa/GUIKitCocoa.dylib (0x13946030). One of the two will be used. Which one is undefined.
Jan 3 15:00:43 Christophes-MacBook-Pro Xojo[481]: objc[481]: Class XOJWebKitDelegate is implemented in both /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Frameworks/HTMLViewerCocoa.dylib (0x56bd140) and /Applications/Xojo 2016 Release 4/Xojo.app/Contents/Resources/Internal Plugins/RBHTMLViewer.xojo_plugin/HTMLViewer/Build Resources/Mac Cocoa/HTMLViewerCocoa.dylib (0x13958140). One of the two will be used. Which one is undefined.
Jan 3 15:00:44 Christophes-MacBook-Pro Xojo[481]: objc[481]: Class QTMovieLayer is implemented in both /System/Library/Frameworks/QTKit.framework/Versions/A/QTKit (0xa484d450) and /private/var/folders/_5/nwzf6x350mxchz8p039rjd8c0000gn/T/dSyIB3.libdtplugins32bits.dylib (0xee0c85c). One of the two will be used. Which one is undefined.
Jan 3 15:00:44 Christophes-MacBook-Pro Xojo[481]: objc[481]: Class QTMovie is implemented in both /System/Library/Frameworks/QTKit.framework/Versions/A/QTKit (0xa484c8b0) and /private/var/folders/_5/nwzf6x350mxchz8p039rjd8c0000gn/T/dSyIB3.libdtplugins32bits.dylib (0xee0c88c). One of the two will be used. Which one is undefined.

Check the plugins folder: do you have a mix of RB and Xojo plugins installed?
If yes, delete the RB ones.

If not, clear the cache

The log messages mentioning GUIKitCocoa.dylib or AppearancePakCocoa.dylib are known and harmless. The messages about libdtplugins32bits.dylib are probably more serious but are not caused by Xojo.

In addition to what joe said most of that is not new to 2016r4