Unlike the removable storage drive in the lower tier 13-inch MacBook, the SSD is soldered onto the mainboard, along with the RAM modules and the processor, making upgrades after the fact an impossibility. Elsewhere, ten accessible screws hold down the new larger trackpad, which is identical to the one found in the 13-inch MacBook Pro with function keys, suggesting a replacement part would be cross-compatible. IFixit also notes that fixing a faulty power switch likely involves replacing the entire logic board, because the button doubles up as a sapphire-topped Touch ID sensor which pairs with the Apple's soldered down T1 chip. Instead, sound is thought to be projected from air vents on the sides of the case – a design feature not seen on the new 13-inch MacBook Pro with function keys. IFixit also found that the new improved speakers are located in the lower portion of the case, while the external speaker grilles are positioned in the top half of the case and don't even go clear through to the internals, making them extremely unlikely to provide any outlet for audio. Orange boxes show where internal speakers are located.
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