MacBook Pro runs much hotter with High Sierra

[idbuythatforadollar]

My 2016 MacBook Pro runs *much* hotter with high Sierra, before updating it would be around 50 Celsius when connected to two ultrafine 4k displays, now it is constantly around 80 celsius when I'm doing simple tasks.

I fresh installed HS when it came out (25/9) so I don't think it is because of indexing.

Am I the only one experiencing this? It makes me very obnoxious.

 

[Cougarcat]

What does Activity Monitor show?

 

[mml78]

I also think my imac 27 late 2015 i7 is runing a litle hoter. But only a few degres, maybe 8 to 10 °C more. Maybe HS uses a little more CPU power. For measure i use Istat Menus. Usually runs between 35-65°C depending what I'm doing.

 

[BlazednSleepy]

Yes, I would check the activity monitor to see if an application or background process is causing the problem.

 

[swarleystinson]

I'm having the same problem. Watching youtube vids or twitch laptop NOTICEABLY hotter than before. Nothing in particular on activity monitor.

 

[mrex]

I was going to say, but now when connected to an external monitor (4K) and the screensaver starts, it doesnt immediately sounds like a jet turbine what was a problem before high sierra. Flash also doesnt seem to stress it as much as earlier. So for me it seems to be opposite.

13” tb, 16gb ram

 

[simonsi]

I'd go through the various PRAM and NVRAM resets and see if that restores the proper thermal control to the fan. 50 to 80 deg is an enormous amount of additional CPU energy if that is where its coming from, Activity Monitor will show the energy usage and guide you as to what is consuming it.

...and simply try to be less obnoxious ;-)

 

[culb0743]

I read that if your Mac has a discrete GPU, High Sierra engages it by default if the system is plugged in. Prior to HS, automatic graphics switching engaged dGPU on an as-needed basis. I'm not sure what this might mean for an iMac as they're always plugged in, but it could account for the hotter temperatures of a notebook running High Sierra.

 

[Super Xander]

The opposite with me, before it was around 37-40°C for normal use, it is around 28-33°C
MacBook Pro TB 13 inch 2016

 

[dborod]

My 2011 mini runs at about 70ºC all the time, and the fan is pretty much always audible, even after the days it took to re-analyze my 300GB photos library.

 

[ZapNZs]

This is probably a hail mary, but have you tried booting without 3rd party login items? I ask because when I went from El Capitan to Sierra, I had 30-40F+ temperature increases, and after spending a long time trying to figure out what it was, I found it was an issue with a program that did not play well with Sierra (an older version of ABBYY FineReader), which was set to startup on login, that for some reason was increasing the dGPU activity (so I wasn't able to easily find it in Activity Monitor as I assumed everything was fine given it did not have elevated CPU usage), consequently making temps spike like crazy, especially when using external displays.

 

[dborod]

This is probably a hail mary, but have you tried booting without 3rd party login items? I ask because when I went from El Capitan to Sierra, I had 30-40F+ temperature increases, and after spending a long time trying to figure out what it was, I found it was an issue with a program that did not play well with Sierra (an older version of ABBYY FineReader), which was set to startup on login, that for some reason was increasing the dGPU activity (so I wasn't able to easily find it in Activity Monitor as I assumed everything was fine given it did not have elevated CPU usage), consequently making temps spike like crazy, especially when using external displays.

That was a good suggestion, but unfortunately booting into safe mode didn't make a difference to the resting temperature. I guess I'll try taking it apart and seeing if there are giant dust bunnies lurking in there.

 

[mrex]

I was going to say, but now when connected to an external monitor (4K) and the screensaver starts, it doesnt immediately sounds like a jet turbine what was a problem before high sierra. Flash also doesnt seem to stress it as much as earlier. So for me it seems to be opposite.

13” tb, 16gb ram

Unfortunately the latest bug fix is causing my macbook run hotter again

Flash and screensaver causing it sound like a jet turbine.

 

[thewhofan]

I read that if your Mac has a discrete GPU, High Sierra engages it by default if the system is plugged in. Prior to HS, automatic graphics switching engaged dGPU on an as-needed basis. I'm not sure what this might mean for an iMac as they're always plugged in, but it could account for the hotter temperatures of a notebook running High Sierra.

Automatic graphic switching still worked as normal on my Macbook Pro whether it was plugged in or not. But with regards to temp, it actually ran cooler, around 5-10ºC when watching twitch streams which tax the cpu.

 

[Honza1]

I read that if your Mac has a discrete GPU, High Sierra engages it by default if the system is plugged in. Prior to HS, automatic graphics switching engaged dGPU on an as-needed basis. I'm not sure what this might mean for an iMac as they're always plugged in, but it could account for the hotter temperatures of a notebook running High Sierra.

I checked and this is incorrect information. My 15inch 2017 TB MBP is - now - running Intel HD while on charger, even though it has dGPU available. This is with Safari as active app. I am sure there are applications which will force dGPU use.

It is also running HS at CPU temp 45 - 50 C with "browse web" type use. While I do not remember what the temp was with Sierra, this is not excessive temperature by any means.

 

[culb0743]

I checked and this is incorrect information. My 15inch 2017 TB MBP is - now - running Intel HD while on charger, even though it has dGPU available. This is with Safari as active app. I am sure there are applications which will force dGPU use.

It is also running HS at CPU temp 45 - 50 C with "browse web" type use. While I do not remember what the temp was with Sierra, this is not excessive temperature by any means.

I apologize for any confusion; I've not yet had any first-hand experience with HS myself. The information came from a source (mackungfu.org) I'm not very familiar with. Thank you for clearing this up.

 

[ressac]

my NT mbp13 2016 runs a lot hotter than it was, only watching youtube.
and mbp15 2016 as well runs hotter, and if connect external 1080 screen and watching movie with browsing it gets about 4000-5000 rpms

 

[friednoodles]

I don't know if it's the same issue you're seeing, but my late 2016 rMBP w/TB runs very hot after it's been in standby sleep at least once, due to what appears to be a pretty widespread problem where Metal/OpenGL/graphics performance becomes terrible after a sleep long enough to enter standby mode. e.g. leave MBP to sleep for a little while, wake it up again, terrible graphics performance (including Metal).

The performance difference is most noticeable if you play a game (where it's literally half the FPS that it was prior to sleep), but it also impacts things like video playback and general graphics performance. This has been brought up by a number of people now on this thread:

https://forums.macrumors.com/threads/macos-10-13-high-sierra-bugs-and-bug-fixes.2049327/

Restarting fixes it, until the next sleep long enough to trigger standby. So maybe restart and see if your problem goes away temporarily? If so, it could be the same issue. How this wasn't caught in testing I'll never know.

 

[KGB7]

That was a good suggestion, but unfortunately booting into safe mode didn't make a difference to the resting temperature. I guess I'll try taking it apart and seeing if there are giant dust bunnies lurking in there.

Quick question, don’t mean to highjack the thread.
But do fans run at full speed when booting in to safe mode? I don’t own Apple laptop or iMac, but when booting windows based laptop in to safe mode, the fans run full speed.
Thanks.

 

[mrex]

Unfortunately the latest bug fix is causing my macbook run hotter again

Flash and screensaver causing it sound like a jet turbine.

They have changed something now (10.13.1 (17B48)), because my macbook pro doesn't spin fans all the time. And that's a good thing. Hopefully they won't break it again whatever they did...

 

[rb1]

Late rMB 2013 15" with dedicated graphix card here and mine runs a lot hotter as well and freezes up/lags on many occasions.

 

[axumnemonic]

the opposite for me. it was around 36 celcius on Sierra. but around 31 celcius on high sierra. (in normal state)

macbook pro mid 2012

 

[Tanuski]

After I updated my MacBook Pro 2015 (linking to an external Apple display) to High Sierra, not only the fans run crazy, the computer became very slow after performing some tusks (within a few minutes).

Wondering if someone can advice on how to fix the problem? Many thanks.

 

[Cougarcat]

After I updated my MacBook Pro 2015 to High Sierra, not only the fans run crazy, the computer became very slow after performing some tusks (within a few minutes).

Wondering if someone can advice on how to fix the problem? Many thanks.

Take a screenshot of activity monitor and post it here.

 

[Tanuski]

Take a screenshot of activity monitor and post it here.

Not sure if I am doing it right.
Here is the screen shot. Thanks.