Show your current location in Maps on Mac
Maps uses your location to help you find directions from where you are to where you want to go, and shows you businesses, restaurants and other places of interest that are nearby.
Allow Maps to use your location
If you see a message that Maps can’t use your current location, you need to turn on Location Services in System Preferences.
On your Mac, choose Apple menu
Open the Security & Privacy pane for me
If the lock at the bottom left is locked
click it to unlock a preference pane.Click Privacy, select Location Services in the list on the left, select Enable Location Services, then select Maps.
Show your location on the map
In the Maps app on your Mac click the Current Location button 
in the toolbar.
A blue dot appears on the map at your location.
Turn off your current location
You can turn off Location Services for all apps on your Mac or just for Maps.
On your Mac, choose Apple menu
Open the Security & Privacy pane for me
If the lock at the bottom left is locked
click it to unlock a preference pane.Click Privacy, select Location Services in the list on the left, then unselect Maps. To turn off Location Services for all apps, unselect Enable Location Services.
For more information about Location Services and privacy see Allow apps to detect the location of your Mac.