You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Mac OS Ventura 13.5-update BROKE Mac Pro firmware or hardware?

After updating to Mac OS 13.5 on the 2023 Mac Pro M2 Ultra

the Mac rebooted normal and around 1 min after login it started to turn up the top fan very high (running around 2490 rpm, before it was 500 to 600) ... first there very many processes and optimization running but it did not stop...

Before the update the Mac was almost completely quiet (latest 13.4).


-I bootet Mac OS in Safe Mode - no change

-I reinstalled Mac OS on the existing hard disk - no change

-Even when installation startet, the fan was running so fast (I installed it from the menu, available from booting the machine with the power key holt for a few seconds).

-A completely new installation of Mac OS 13.5 on another SSD - no change


Seems there is a problem with hardware? Maybe the Mac firmware was corrupted with the first 13.5

update? Or it broke a hardware part? The German Apple hotline told me, I should contact a local Apple Service partner, if these previously mentioned options don't help...

Is there another possibility?


Mac Pro (2023)

Posted on Jul 25, 2023 9:48 AM

Reply
Question marked as Top-ranking reply

Posted on Jul 25, 2023 6:09 PM

I think I found the problem:

After unplugging all USB cables and the network connection the fans seemed to work normal again...

I found out: With no Ethernet connection there is no problem so far.

It seems to be only a problem with multi gigabit LAN and after changing from automatic (10GbaseT connection) to 1000baseT the top fan instantly started running much slower again and back to normal speed... I don't know yet, if the problem completely disappears with 1000baseT Ethernet.

With 5GbaseT the fan also stared running faster, but not so fast after 2 min (and I changed back to 1000baseT)


Can this be a hardware problem after the 13.5 update or only a problem Apple can fix in software? Does anybody else have this problem with multi gigabit Ethernet?

Similar questions

6 replies
Question marked as Top-ranking reply

Jul 25, 2023 6:09 PM in response to okay4353

I think I found the problem:

After unplugging all USB cables and the network connection the fans seemed to work normal again...

I found out: With no Ethernet connection there is no problem so far.

It seems to be only a problem with multi gigabit LAN and after changing from automatic (10GbaseT connection) to 1000baseT the top fan instantly started running much slower again and back to normal speed... I don't know yet, if the problem completely disappears with 1000baseT Ethernet.

With 5GbaseT the fan also stared running faster, but not so fast after 2 min (and I changed back to 1000baseT)


Can this be a hardware problem after the 13.5 update or only a problem Apple can fix in software? Does anybody else have this problem with multi gigabit Ethernet?

Jul 25, 2023 10:24 AM in response to okay4353

okay4353 wrote:

After updating to Mac OS 13.5 on the 2023 Mac Pro M2 Ultra
the Mac rebooted normal and around 1 min after login it started to turn up the top fan very high (running around 2490 rpm, before it was 500 to 600) ... first there very many processes and optimization running but it did not stop...
Before the update the Mac was almost completely quiet (latest 13.4).

-I bootet Mac OS in Safe Mode - no change
-I reinstalled Mac OS on the existing hard disk - no change
-Even when installation startet, the fan was running so fast (I installed it from the menu, available from booting the machine with the power key holt for a few seconds).
-A completely new installation of Mac OS 13.5 on another SSD - no change

Seems there is a problem with hardware? Maybe the Mac firmware was corrupted with the first 13.5
update? Or it broke a hardware part? The German Apple hotline told me, I should contact a local Apple Service partner, if these previously mentioned options don't help...
Is there another possibility?



If the Mac is hot I would let it cool down before you reboot as normal.


Apple support is here—>


Call Customer Support (800) MY–APPLE (800–692–7753)

or on line https://getsupport.apple.com/


Outside the USA—Contact Apple for support and service by phone

See a list of Apple phone numbers around the world.

Contact Apple for support and service - Apple Support



Jul 25, 2023 10:40 AM in response to okay4353

Make sure to disconnect all external devices in case one of them is causing a problem. If this is a desktop system, then of course you need to connect a display.


Did you try to perform a firmware "Restore"? Unfortunately this requires access to another Mac running macOS 12.4+ (at least last time I checked, the OS requirement for the host keeps increasing). This destroys all data on the internal SSD, resets the firmware & security enclave & pushes a clean copy of macOS onto the internal SSD. Test with the clean install before installing any third party apps and before restoring from a backup since third party apps & restoring from a backup could bring the problem back. For testing we want to know if a pure system still has the problem since this will tell us if this is a hardware issue or an issue with third party software (or a bug with the update).

Revive or restore a Mac with Apple silicon using Apple Configurator - Apple Support


You can try running the Apple Diagnostics to see if any hardware issues are detected.


Mac OS Ventura 13.5-update BROKE Mac Pro firmware or hardware?

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.