Why Family Share not show up on my MacBook Pro? Help

I am supposed to be part of a Family Share account. I can access Family Share & other family member's purchases on my iPad but NOT on my MacBook Pro that is running Maverick OS. I log into iTunes, click on the drop down window at the top where my name is located but when the window drops down Family Share is not an option nor am I able to see the names of the other family members in the group. I have tried going to "System Preferences" to "iCloud" and then try to look for "Manage Family" but it is not there. Even if I then if after getting to "iCloud" & logging into "Account Details" there is not anything about "Manage Family" or "Family Share"

Can you not participate with Family Share using Maverick OS?

I would REALLY appreciate assistance with this issue.