Obviously other than muting the computer. I just want to create a screenshot without having that "camera sound" come out.
Is there a way to disable this sound?
After launching Grab, open preferences (in the menus, click Grab => Preferences) and uncheck "Enable Sound".
A screenshot of the preferences here:
You can turn off user interface sounds, though that will remove the empty trash sound and the like.
I havent tried it, but the file itself resides at