Close Window (Xcodes "Installation Alert") that has no kind of closing elements

Question

Is there a tool with which I can click on a window and the tool will tell me which process that window belongs to ?

Explanation:

I was working in Xcode 3.2.3 for iPhone OS 4.0beta3. Wanted to install old Xcode (all old SDKs got removed with beta3).

Didn't want to waste time so I kept working in new Xcode for iPhone OS 4.0beta3 while downloading and then starting the installation of xcode 3.2.2 with iPhone SDK 3.2.

After sometime there came this window:

"Installation Alert"

In order to continue installation, please close the following application:
Xcode

But by then I didn't want to interrupt my programming session as I was near a next milestone. Well, next day and after a Macbook standby I finally wanted to close the Xcode with SDK 4beta3 and finally install the old SDK. But the Installation Alert wouldn't disappear (even though Xcode was closed now). So I thought ok, then lets just stop and restart the Xcode Installation... So I went to the "Activity Monitor" and stopped the Xcode Installation. The Xcode Installation window got closed, but the "Installation Alert" is still there.

So how do you get rid of such a window ? It has no buttons, no menu in which to select a "close window".

Edit: Well a restart of course solves this problem. And I never faced this problem again.

Answer 1

He's right. Kill 'AlertAll' and that will allow you to proceed. Make sure iTunes is also killed.

Answer 2

Killing the ItunesHelper is the solution.

For those who don't remember how to do that:

1. Go to Utilities
2. Open Activity Monitor
3. Find the ItunesHelper in the list of running processes.
4. Click on the "Quit process" button on the upper left corner of the window.