FabFilter

i have downloaded the fab bundle and executed the dmg on my imac.
Now the question where to find the installed program ? I would like to run pro q 2 on my mac ...
any help available ?

Pro-Q 2 is not a standalone program or app.

Pro-Q 2 and all other FabFilter products are plugins that run within various audio (and some video) applications like Pro Tools, Logic Pro, Reaper etc.

Once you install a plugin or bundle, launch an app that supports plugins in a format that FabFilter comes in (AAX, VST, Audio Units etc.) and you should see FabFilter products such as Pro-Q 2 available to run as a plugin within a support app (AKA host).