Question: I know that a 12.5 mm high hard drive fits, but I can’t find any information about whether a 15 mm high hard drive fits.
Western Digital offers a 2 TB hard drive that’s 15 mm high and there’s no 12.5 mm hard drive that offers more than 1 TB. So the question is, does the 2 TB hard drive fit in a MacBook Pro despite being 2.5 mm higher?
Answer: No it will not fit, those laptops are built with slimness in mind, that being said they ensure everything is compacted as much as possible, including the compartment for the hard drive.
You will need another drive that’s 12.5 to fit in there, a 15mm will be to big.