After saving your profile you can find the general path to your profiles here:
I know, you´re asking for the location on a MacOS. However, if it as tricky on a MacOS as on a WindowsOS to find the actual location of the profiles (not listed in the link above) after the general path - this might help you:
On a Windows OS you need to open application files behind the general path and not the folder named after the Cubase version you are looking for. Here, you´ll find another set of folders named after your installed Cubase versions, too. That´s where you´ll find your profiles (*srf).
Saving your profile, make sure to do it in this order: