Antwort auf „iFixIt Pentalobe screwdriver doesn't fit”I know this is about 4 years since the original post, but this came up via search, so maybe others will find this helpful. The T5 screwdriver doesn’t open the bottom case. You need P5, PENTALOBE, to open it. They’re different from each other. iFixit’s product is here: P5 Pentalobe Screwdriver Retina MacBook Pro and Air You also get the P5 (and T5) bits in the Pro Tech Toolkit.