In a small bowl, stir together 1/2 cup apricot jam, 3 tablespoons white vinegar, 1 clove garlic, 1/4 teaspoon salt, and 1/4 teaspoon black pepper. Set aside.
Preheat your grill on high heat for about 10 minutes.
Prepare 4 thick bone-in pork chops by patting them dry with paper towels and lightly seasoning both sides with salt and pepper. Reduce the grill heat to medium, and place the pork chops on the grill. Cook for 5 minutes.
While the pork chops are cooking, brush 1 tablespoon olive oil all over the halved 6 apricots. Place them on the top rack of your grill (or over indirect heat) and cook for 5-7 minutes.
Flip the chops, and then brush with the apricot glaze. Cook for 1 minute, flip again, and brush with more glaze. Continue flipping and glazing chops until you use all the glaze, about 5 minutes. The pork chops should cook for a total of 10 minutes.
Remove the pork chops and apricots from the grill to a serving platter. Tent loosely with foil and let the pork chops rest for 5 minutes before serving.
Notes
Brush the glaze on during the final minutes of grilling to prevent burning.
Peaches or nectarines can be substituted for apricots.
Boneless pork chops may cook faster, so check early with a thermometer.