Core, peel, and slice apples.  Place in a pressure cooker, filling up to the "max fill" line. Add apple cider, maple syrup, and cinnamon.  Close pot and cook on high pressure for 5 minutes.  Let pot rest for 5-10 minutes after cooking and then release remaining steam and remove lid.  (You can let it rest for longer than 5-10 minutes if you like, it's flexible).Either use an immersion blender to pulse to desired consistency, or transfer to a blender and pulse, or use a food mill.  Store in fridge.  makes about 2 quarts.