Place metal rack in bottom of slow cooker; pour in cider. Place coated pork roast on rack in slow cooker.
Cover and cook on low 9 to 10 hours. Then turn on high. Remove pork and rack; cover and keep warm. In small bowl, combine water and cornstarch; stir until smooth. Add to drippings in pot.
Cook on high 20 to 30 minutes or until thickened, stirring occasionally.
Slice roast; garnish with apple wedges.
Serve pork with sauce.