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 (around 2490 rpm, before it was 500 to 600) ... first there very many processes and optimization running but it did not stop now for 40 min.
How can this happen? How can I stop it? It's very loud and before the update it was always completely quiet.
Martins MacPro
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?
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?
After sleep mode the Mac Pro fans always work normally for around 1 min and then the top fan starts running to fast again...
Fan control on 2023 Mac Pro broken after update to 13.5? How can this happen?
