Okay here it is :-( I select Macintosh HD)
Verify disk
Pop Up
"Disk Utility stopped verifyin 'Macintosh HD' because the following error occured. The underlyin task reported failure on exit" Then I press okay. Here are the results I see
Verifying volume "Macintosh HD"
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Invalid node structure
The volume Macintosh HD needs to be repaired.
Error: The underlying task reported failure on exit.
1 HFS volume chcked
Volume Needs Repair