Apple macbook air 13 m3 chip 16 gb 512 gb midnight July 8, 2019 16 32 64 128 Apple macbook air 13 inch with m2 chip 256gb (mly33) midnight Apple macbook air 13 inch m1 chip 8gb 256gb Apple macbook air 2020 13 inch m1 8gb 512gb Apple macbook air 13 mgn63ze/a