macOS IB warning:Image scaling is not supported on Mac OS X versions prior to 10.5.2

[younker]

I use xcode 3.1 beta2 to create a simple login window, but when compile, I got the following error.
CompileXIB /Users/younker/Developer/Example1/English.lproj/MainMenu.xib
cd /Users/younker/Developer/Example1
/Developer/usr/bin/ibtool --errors --warnings --notices --output-format human-readable-text --compile /Users/younker/Developer/Example1/build/Debug/Example1.app/Contents/Resources/English.lproj/MainMenu.nib /Users/younker/Developer/Example1/English.lproj/MainMenu.xib
/* com.apple.ibtool.document.notices */
/* com.apple.ibtool.document.warnings */
/Users/younker/Developer/Example1/English.lproj/MainMenu.xib:458: warning: Image scaling is not supported on Mac OS X versions prior to 10.5.
/Users/younker/Developer/Example1/English.lproj/MainMenu.xib:460: warning: Image scaling is not supported on Mac OS X versions prior to 10.5.
/* com.apple.ibtool.document.errors */

what does this warning mean? how can I remove this warning?

 

[kainjow]

In IB, go to Window > Document Info, and for the Deployment Target popup, select Mac OS X 10.5.x

 

[younker]

In IB, go to Window > Document Info, and for the Deployment Target popup, select Mac OS X 10.5.x

Thank you very much, solved this now.