In the link Trevor provided, you'll find
TMapViewer which support Google Maps, etc.
If you want to use Apple Maps then you'll have to implement
Apple's Map Kit - I did search for it, but couldn't find an implementation.
Maybe the creator of TMapViewer would be open to add support for Apple Maps as well, but I'm not sure it's still maintained, and I'm not sure Apple Maps can be used cross platform (without using Map Kit).