How to make a OG private? I want to make an Organic group private,to be seen only from members of this group.
All the other will get an "Access denied" or something like that.
For the time being,I can see the Group but not its content.
I would also want NOT to be able to see the existance of the group,if I am not a member of it.
I am working on Drupal 7.
How to do that?
Thanks
You need to enable og access control module.

see below: 


Then navigate to admin/config/group/fields, add an visibility field to your og bundle



Then edit the og bundle content type, there is a new field added to it, make your change for public or private