Firmware that addresses thermal throttling for both Mac OS and Windows

hajime

macrumors 603
Original poster
Jul 23, 2007
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Hi, I just had a chat with Apple. I mentioned that there were lots of complaints about thermal throttling and Apple only released software fix for Mac OS not Windows. He told me that Apple released a firmware fix on hardware level so that now thermal throttling issues under both Mac OS and Windows are both taken care of. When did it happen? I don't recall readng it.
 

afir93

macrumors 6502a
Jan 5, 2018
730
907
macOS High Sierra Supplemental Update 1 and 2. The first one came about a week after the release of the 2018 MBPs, the second one at the end of August. I believe the first one didn't address the throttling issues under Windows yet (but under macOS), so the second one most likely did that.
 
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mr.anthonyramos

macrumors 6502a
Apr 25, 2015
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And of course, here is to hoping that additional tweaks were made within the Mojave update. Personally I haven't noticed anything but I am assuming that there should be.
 

iMacDragon

macrumors 68000
Oct 18, 2008
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UK
Supplemental 2 made it behave in windows, though I don't honk there was any official note of his, nor was it widely noticed. But around this time the Mojave betas also included it.
 

maflynn

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May 3, 2009
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Supplemental 2 made it behave in windows, though I don't honk there was any official note of his, nor was it widely noticed. But around this time the Mojave betas also included it.
I just booted into windows, and my temps shot straight to 100c, AND the fans were not running. I didn't do much in windows, and the temps barely retreated and hung between high 80s and 90s. I opted to re-boot into macOS since my bootcamp is cooking the internals of my MBP. This is why I opted to use VMware instead of bootcamp. I was waiting to delete the bootcamp partition but I suppose there's little reason to keep it now.
 

fokmik

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Oct 28, 2016
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if your temp were around 80-90, still good...but not good if these temp are only on idle and not using the laptop...
I have around 82C using photoshop even after 30-40 min...still, when i run the app, for around 2-3 min the temp are around at 99C, then the fans running at full speed i think, and after few more minutes the temp is set around 82C and the fans around 3200rpm
 

maflynn

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if your temp were around 80-90, still good...but not good if these temp are only on idle and not using the laptop.
My temps in windows on idle were 87c. I waited a few minutes after reboot to see if the temps retreated. What bothered me the most was that I did not hear my fans spin up in windows. In macOS, that's not an issue, in fact once I rebooted back into macOS the fans ramped up to cool the laptop given the high temps :(
 

iMacDragon

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Oct 18, 2008
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My temps in windows on idle were 87c. I waited a few minutes after reboot to see if the temps retreated. What bothered me the most was that I did not hear my fans spin up in windows. In macOS, that's not an issue, in fact once I rebooted back into macOS the fans ramped up to cool the laptop given the high temps :(
Oh, yes, if you use macs fancontrol in macos with non automatic settings it seems to completely break fans in windows, I recall noticing. If it's put back on auto, then they work normally in bootcamp.
 

iMacDragon

macrumors 68000
Oct 18, 2008
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Ohhh, I didn't know this. When I get another chance to reboot into windows, I'll test that out. Thanks for the heads up
Yeah, not quite sure who's bug this should be more counted as.. basically I think the SMC in T2 behaves differently to older ones in more ways than realised.. workaround would probably be for macs fan control to implement a reset to auto on shutdown if they can.
 

maflynn

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May 3, 2009
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Yeah, not quite sure who's bug this should be more counted as.. basically I think the SMC in T2 behaves differently to older ones in more ways than realised.. workaround would probably be for macs fan control to implement a reset to auto on shutdown if they can.
That did it, I now see my temps in the 50c range doing little work, where as I was hitting 92c in windows :)
 
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