Preheat oven to 425°.
Place a nonstick skillet coated with cooking spray over medium-high heat until hot. Add apple and sugar; sauté 3 minutes. Remove from heat; set aside.
Spread 1 tablespoon cream cheese over each bagel half; top each with 4 apple wedges. Sprinkle cheese and bacon evenly over apple. Bake at 425° for 8 minutes. Remove from oven; sprinkle with green onions.