'How to get the process id (PID) of an app launched using `open` command on OSX?

I've launched an application via the open command on the OSX command line like so:

open -a "/Applications/Adobe After Effects CC/Adobe After Effects CC.app"

I want to get the process id of that launched application. Is there any way to do this reliably on OSX? It doesn't seem open returns anything, so I'm not sure I can even pipe its result into something like ps to perform a grep operation. I thought that maybe since the app is launched via the terminal I would know which app is the frontmost, but am doubting the reliability of that solution. Any ideas?

macosterminal


Solution 1:[1]

These days, pgrep -n $APPLICATION_NAME seems like the easiest way to accomplish this. From the man page:

-n    Select only the newest (most recently started) of the matching processes.
-o    Select only the oldest (least recently started) of the matching processes.

Solution 2:[2]

Activity Moniter

You can use Activity Moniter. Located in /System/Applications/Utilities/Activity\ Monitor.app

Open the app, hit the search bar on the top and search for the app you want to get the PID of. Example

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Carter
Solution 2 Kiefer Lin

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