You can use Outlook for Mac 2016 to access a calendar that another person has shared with you.
Note: The person sharing the calendar needs to grant you at least Reviewer access. If you only have "Limited Details" or "Free/Busy access" you will not be able to open the calendar on a Mac.
If the calendar owner does not want to grant Reviewer access, you can use Outlook Web App to view the calendar instead.
For assistance, contact the Service Desk.