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Old 02-12-2018, 09:52 AM   #8
kero
Human being with feelings
 
Join Date: Jan 2016
Location: London
Posts: 544
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Quote:
Originally Posted by serr View Post
I bet I know what it is.

What CPU is in that MBA? Some 2 core model that doesn't support hyperthreading right?

Your newer MBP would have a 4 core i7 that supports hyperthreading and it would be turned on by default. Disable hyperthreading! Reaper pointedly wants to manage CPU threads itself and it conflicts with hyperthreading.

Open Activity Monitor. See 8 cores? Then hyperthreading is on for your 4 core CPU. Turn it off.

You can turn it off temporarily in System Preferences until the next reboot. Or turn it off with the Terminal command which stays put until you turn it back on yourself.

. . . you can permanently disable hyperthreading by issuing the following command in the Terminal:

sudo nvram SMT=0

To re-enable hyperthreading, use the command:

sudo nvram -d SMT

Changes take place on a reboot . . .
Thank you, but why should this suddenly start, its been fine for over a year!
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