Help me to set permission to folder /Library/Preferenses
I installed Adobe InDesign CC, but when program doesn't starts. It says: "Error. Unable to launch Adobe InDesign as you lack sufficient permissions to access the preferences folders. Ensure that you have appropriate permissions and then restart Adobe InDesign." I found a reason here https://forums.adobe.com/thread/1314214?start=0&tstart=0 But I cannot add the Admin and all users showing, and change permission for all users and admin as read/write. System says that I have not enough rights to do this. I'm only one user of my MacBook Pro late 2013. I have only one user – Admin. My OS is El Capitan 10.11.4. Help please.
MacBook Pro with Retina display, OS X El Capitan (10.11.4)