Current OSM data license is ODBL 1.0 [1], I think Apple would have a problem with having to share modifications they made to the data (especially if they merge in data from commercial sources).
Share-Alike: If you publicly use any adapted version of this database, or works produced from an adapted database, you must also offer that adapted database under the ODbL.
Volkswagen Group / Volkswagen AG are using Here (formerly known as Nokia Here): "On 3 August 2015, Nokia announced that it had reached a deal to sell its Here digital maps division to a consortium of three German automakers—BMW, Daimler AG, and Volkswagen Group, for €2.8 billion" [1]
Share-Alike: If you publicly use any adapted version of this database, or works produced from an adapted database, you must also offer that adapted database under the ODbL.
[1] https://opendatacommons.org/licenses/odbl/1.0/