2018 MacBook Pro Thermal Bug

I did not write about this last week when it happened, because it appears as though there is a barrage of negative stories about Apple and with everything going on the world, who needs additional stories to get riled up about. Last week Dave Lee posted a video that showed that the Core i9 model of the 2018 MacBook Pro was throttling down its CPU under heavy loads. If you were to buy one of these computers, you would expect it to work really well, regardless of how much load the computer was under.

When the video was released many were skeptical that this was actually the case, and if it was indeed the case, that it was a design flaw with the MacBook Pro. It appears as though it is not a design flaw, but in fact it is a bug with the new 2018 MacBook Pros. Here is Apple’s statement:

Following extensive performance testing under numerous workloads, we’ve identified that there is a missing digital key in the firmware that impacts the thermal management system and could drive clock speeds down under heavy thermal loads on the new MacBook Pro. A bug fix is included in today’s macOS High Sierra 10.13.6 Supplemental Update and is recommended. We apologize to any customer who has experienced less than optimal performance on their new systems. Customers can expect the new 15-inch MacBook Pro to be up to 70% faster, and the 13-inch MacBook Pro with Touch Bar to be up to 2X faster, as shown in the performance results on our website.

This means that it is not the hardware itself that was the issue, but in fact it is software related. It is good to see that Apple took this seriously and found the cause of the issue. This bug affects the 13-inch models as well as the Core i7 and Core i9 15-inch models. It is highly recommended that you get the supplemental update to fix the issue. You can download it via the Updates tab in the Mac App Store, or by downloading it directly from Apple’s support page.

Via Six Colors.