I have an older 2008 MacBook Pro. I know that there are two different thicknesses of hard drives. It doesn't say if it's 12.5 or 9.5mm thick? Anyone? http://www.newegg.ca/Product/Product.aspx?Item=N82E16822136835
It will fit, as it is 9.5mm high: http://www.wdc.com/en/products/products.aspx?id=130 found via "WD7500BPKT" MacBook, MacBook Pro: Replacing the Hard Disk Drive, transferring data to the new HDD