To make the salsa:In a bowl, stir together the mango, avocado, onion, lime juice, cilantro, and jalapeño. Cover the salsa and refrigerate until ready to serve.
Place the pork chops in a nonreactive dish.
Add the garlic, onion, scallion, cumin, olive oil, salt and pepper evenly over both sides of the chops, cover, and refrigerate for at least 3 hours or up to overnight.Prepare a grill. Season the pork chops on both sides with salt.
Place on the grill rack and cook, turning once, until etched with grill marks, golden and light pink at the center when cut into with a knife. About 5 to 6 minutes per side.
Cut the pork into thin strips and divide the pork evenly among the tortillas.
Drizzle with the avocado-mango salsa, garnish with the cilantro, and serve immediately.