What would you recommend as something visible that someone might use to identify a cable before the cable itself is purchased and opened? Or even upon simply opening and seeing the cable, without plugging it in to a powered-on MBP to see what it's delivering? So far I've found the finger count to be the sure way to identify that capability. I should reiterate here that, so far, every single cable with 2 fingers has given 86W while every single cable with 3 fingers has given 60W and that seems more than coincidental and could be tied to the manufacturing process somehow, though I grant that it may indeed be simple coincidence, given my small sample size.Įven if it *is* coincidental, this still does not clear up the difficulty of identifying which of the cables will carry 86W versus 60W while they're still inside the Apple packaging, at least as far as I can tell, given that they're sold under one title by Apple.
Figured this might help someone who would be similarly confused. TLDR: 2-pin USB-C charging cables give 86W, 3-pin cables give 60W, while using the Apple 87W charger (and at least is this way with my 2017 15" MBP, not sure about other laptops). I'd be very curious to see if anyone can replicate this with their setup. I now have 2 of the treasured 2-pin cables and will try and find a third (I have three chargers - mobile, home, office). There is no way to figure out if a given cable has 2 pins (and will give 86W) or 3 pins (and will only give 60W). This is made all the more difficult that all are simply boxed as USB-C charging cables. On the cables that delivered 86W, only 2 pins were visible at the very tip (see picture at the bottom in imgur album linked).
On the cables that delivered 60W (and, when used, his diagnostic tool indicated my MBP was not getting enough charge), 3 pins were visible at the very tip (see picture at the top in imgur album linked). Desperate, I started inspecting the cables furiously trying to figure out what could be going on. It delivered 86W! So, my cable was bad, right? Finally, we thought that perhaps my cable had gone bad. We tried a variety of different chargers, thinking it was the charger.
The Apple Store tech ran a series of diagnostics and was super helpful. What I did: I went to the Apple Store locally to figure out why I was only getting 60W delivered regardless of port I used, electrical outlet I used, etc. I had seen it delivered 86W with other situations so I knew my MBP could receive the wattage. The situation: MacBook Pro 2017 15" with an official Apple 87W charger, only getting 60W delivered according to System Information (accessible via -> About This Mac, System Report, in the Power section at the left, scroll all the way to the bottom when plugged in).
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