01 - Set oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together all-purpose flour, baking soda, ground cinnamon, ground nutmeg, and salt. Reserve mixture.
03 - In a large bowl, beat the softened unsalted butter, packed light brown sugar, pure maple syrup, and granulated sugar until light and fluffy, about 2 minutes using an electric mixer or whisk.
04 - Add eggs one at a time, beating after each addition. Mix in pure vanilla extract.
05 - Gradually add dry mixture to the wet ingredients and blend until just combined, avoiding overmixing.
06 - Fold in old-fashioned rolled oats, finely diced apple, and raisins, mixing until evenly incorporated.
07 - Drop tablespoon-sized portions of dough onto the lined baking sheets, spacing dough mounds about 2 inches apart.
08 - Bake for 12 to 14 minutes until the cookie edges are golden and the centers are set.
09 - Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.