I've got a peculiar issue on my M4 Max running latest macOS 15.5 (non-beta). When playing games on Geforce NOW, the system regularly grinds to a near halt and at the same time only efficiency cores are active. This is silly.

How can I work around this? Is there a good way to diagnose why only efficiency cores are active?

Update: The symptoms in my case match those described in better detail here Why does my M2 MacBook Air aggressively throttles P-cores based on a non-CPU sensor, even when CPU is cool?

I've also just observed it without Geforce Now being active at all.

I've got a peculiar issue on my Mac M4 Max running latest macOS 15.5 (non-beta). When playing games on GeForce Now, the system regularly grinds to a near halt and at the same time only efficiency cores are active. This is silly.

How can I work around this? Is there a good way to diagnose why only efficiency cores are active?

Update: The symptoms in my case match those described in better detail here on the Apple Stack Exchange.

I've also just observed it without GeForce Now being active at all.

I've got a peculiar issue on my M4 Max running latest macOS 15.5 (non-beta). When playing games on Geforce NOW, the system regularly grinds to a near halt and at the same time only efficiency cores are active. This is silly.

How can I work around this? Is there a good way to diagnose why only efficiency cores are active?

Update: The symptoms in my case match those described in better detail here Why does my M2 MacBook Air aggressively throttles P-cores based on a non-CPU sensor, even when CPU is cool?

I've got a peculiar issue on my M4 Max running latest macOS 15.5 (non-beta). When playing games on Geforce NOW, the system regularly grinds to a near halt and at the same time only efficiency cores are active. This is silly.

How can I work around this? Is there a good way to diagnose why only efficiency cores are active?

Update: The symptoms in my case match those described in better detail here Why does my M2 MacBook Air aggressively throttles P-cores based on a non-CPU sensor, even when CPU is cool?

I've also just observed it without Geforce Now being active at all.

I've got a peculiar issue on my M4 Max running latest macOS 15.5 (non-beta). When playing games on Geforce NOW, the system regularly grinds to a near halt and at the same time only efficiency cores are active. This is silly.

How can I work around this? Is there a good way to diagnose why only efficiency cores are active?

I've got a peculiar issue on my M4 Max running latest macOS 15.5 (non-beta). When playing games on Geforce NOW, the system regularly grinds to a near halt and at the same time only efficiency cores are active. This is silly.

How can I work around this? Is there a good way to diagnose why only efficiency cores are active?

Update: The symptoms in my case match those described in better detail here Why does my M2 MacBook Air aggressively throttles P-cores based on a non-CPU sensor, even when CPU is cool?