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Created attachment 11309 [details]
source code and executable
click a button on the form, a thread is started, periodically calling Control.invoke.
On windows, the title of the form is updated every one second.
but on OS X, the title usually remain the same, unless I drag the window around or do something else to the window.
Environment: Windows 7->VMware Workstation 9->OS X 10.9
Comple: Visual Studio 2013 Update 4
Command Line: sudo mono WindowsApplication2.exe
Public Class Form1
Delegate Sub UpdateTitle()
Dim k As New UpdateTitle(Sub()
Me.Text = Now.ToString
Private Sub test()
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim t As New Threading.Thread(AddressOf test)