Invalid color System, labelColor (warning given only once)
问题 I am getting following warning on OS X 10.9 console at the time of nib load( NSWindowController ). Invalid color System, labelColor (warning given only once) I am using Xcode 6 and OS X 10.10 to compile my code. Most probably this warning is coming because of NSColor exposes new system colors in 10.10 for static text and related elements: labelColor, secondaryLabelColor, tertiaryLabelColor, and quaternaryLabelColor. How to fix this warning? 回答1: Change your textfield's color in your xib file