Canning: there are several ways to sterilize your jars for canning. You can run them through a short cycle on your dishwasher. You can place them in a large pot (12 quart) of water on top of a steaming rack (so they don't touch the bottom of the pan), and bring the water to a boil for 10 minutes. Or you can rinse out the jars, dry them, and place them, without lids, in a 200°F oven for 10 minutes.
*If you don't want to steam the apples, you can place the slices and 1/4 c water in a medium saucepan and cook until soft. Drain from remaining water and then place the apples in a blender.