Background
Calling -beginWithCompletionHandler: on NSOpenPanel causes the user interface to hand of about a second after the use hits the open button.
Two messages error messages are printed,
* WARNING: Method userSpaceScaleFactor in class NSWindow is deprecated on 10.7 and later. It should not be used in new applications. Use convertRectToBacking: instead.
and,
WindowServer[90]: CGXDisableUpdate: UI updates were forcibly disabled by application "OpenPanelTest" for over 1.00 seconds. Server has re-enabled them.
The solution seems to be to instead run a modal window (although this is really not a general solution!)-beginSheetModalForWindow: completionHandler:, the warning 'userSpaceScaleFactor...' is still printed the user interface no longer hangs.
My question
Is this a bug or am I doing something wrong or have the wrong Xcode settings? I do not have sandboxing enables, nor is code signing activated. This behaves the same in both plain Application and Document-based Applications. Would you recommend I submit to Apple? With Open Panels being used in almost every App I find it strange that Google finds virtually nothing on this.
Update
Example code is available on github, https://github.com/danieljfarrell/AppTest-NSOpenPanel
