Is this the first time you use the Bitnami OS X VM for WordPress? Could you please let us know if you made any change in the application before running into this issue?
If you don't have any data in the machine, you can remove the VM and initialize it again by following these steps:
- Stop the VM and close it completely
- Remove the VM
rm -rf ~/.bitnami/stackman/machines/wordpress/
- Start the VM again and start the initialization process