Apple releases firmware update for CPU throttling in new MacBook Pros

“Apple has identified a software bug that causes all of its recent MacBook Pros (not just the Core i9 version) to throttle back its CPU under heavy thermal loads,” Jamie Lendino reports for ExtremeTech.

“Thankfully, it looks like it’s not a hardware problem because that would have been a total disaster,” Lendino reports. “A new OS update, called macOS High Sierra 10.13.6 Supplemental Update, addresses the problem in firmware.”

Lendino reports, “An Apple spokesperson got in touch with ExtremeTech with the following response to the issue: ‘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.'”

Read more in the full article here.

MacDailyNews Take: Our breathing hath now returned to normal rhythm.

The macOS High Sierra 10.13.6 Supplemental Update (1.31 GB) improves the stability and reliability of MacBook Pro with Touch Bar (2018) computers and is recommended for all users. More info and download link here.

Gizmodo reviews Apple’s new MacBook Pro: ‘So good the price is almost worth it’ – July 24, 2018
Thinner and lighter laptops, a trend driven by Apple, have screwed us all – July 24, 2018
How to fix Apple’s MacBook Pro throttling and give yourself much more performance with just a few clicks – July 24, 2018
MacBook Pro CPU throttling controversy continues as Intel says it’s okay – July 24, 2018
Engadget reviews Apple’s new MacBook Pro: Exactly what you’ve been waiting for – July 23, 2018
About that MacBook Pro Core i9 throttling claim – July 20, 2018
Mashable reviews Apple’s new 15-inch MacBook Pro: ‘An insanely powerful machine’ – July 19, 2018
MacBook Pro (mid 2018) throttling – July 19, 2018
Apple’s new 13-Inch MacBook Pro with Touch Bar sports four full-speed thunderbolt 3 ports – July 19, 2018
TechCrunch reviews Apple’s new 15-inch MacBook Pro: ‘Extremely powerful machine; Apple’s not messing around here’ – July 18, 2018


  1. Apple PR BS. Hard to believe they didn’t know this. They just realized they couldn’t get away with throttling

    Say bye to battery life on an already crap battery life machine.

  2. Have there been ANY product launches under Cook’s (lack of) leadership that were NOT fraught with problems? Seriously, has Apple under Pipeline Timmy gotten ONE thing right, without having to go back and fix, explain or otherwise rectify a blunder?

    Anybody? Hello? Buehler?

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