How to determine which process owns a window or notification in OS X

On Mac we are used activity monitor
Refer this link it will be solve your problem
https://support.apple.com/en-gb/HT201464

Activity Monitor is GUI utility that's easiest to look up.

It basically combines the functionality of several command line tools into one easy interface.
top <-- similar to Activity Monitor
ps <-- shows processes
lsof <-- list open files and the process it's connected to
dtrace
netstat <-- network
systemstats
there's other's too

I am familiar with Activity Monitor.   I looked at Activity Monitor to see if it had that functionality.

If someone asked me this question about Windows, I would say:

1. Download Process Explorer from https://technet.microsoft.com/en-us/sysinternals/bb896653.aspx and run it.
4. Drag the toolbar icon that looks like a target, and drop it on the window or dialog in question, and the process that owns the window will be highlighted in blue.

So, let me rephrase the question:
How can I determine which process owns a window or notification in OS X using Activity Monitor?

Thanks!