In a large bowl, cream butter and sugars on medium speed, until well combined and creamy. Beat in the eggs and vanilla.
In a separate mixing bowl, whisk together the flour, baking soda, cinnamon and salt.
Gradually pour the dry ingredients into the bowl of wet ingredients, mixing as you add. Fold in the oats and apples.
Drop dough by rounded tablespoonfuls onto ungreased cookie sheets and bake for 8 to 10 minutes, or until the cookies just start to turn a light golden brown.
Remove from the oven and cool on the cookie sheets for one minute, then transfer cookies to a wire rack to finish cooling.
Notes
Nutrition information may vary based on exact ingredients used and serving size. This recipe should make about 36-48 cookies, using about a Tablespoon of dough per cookie.