Xcode 4 – Debug Area no longer shows my console output (NSLog)

I had the same issue. Below are fix for this :

1. You console may be hidden. Press Show the console button present in right corner (blue coloured when console is open).

   

2. You may be displaying Debugger or Target output. Select All Output (Checkmark is displayed when selected).

3. a. Open Xcode preference (shortcut: cmd + ,).

   b. Select Behaviours tab from pop-up.

   c. From the Build sections select Succeeds.

   d. Enable Show debugger with Current Views.

   e. Select Console View from the drop-down list.