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When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.
Hi there,
After week with Big Sur my 16” MacBook Pro i9, 32GB ram is just not coping well. The fans are spinning like crazy all windows lags I’m not able to work on it. My CPU load is very high & kernel-ask & WindowServer also. I’m using two 4K monitors if this makes any difference. The MacBook was fas previously just slowed down recently. I have no applications running and the load is crazy high.
MacBook Pro 16″, macOS 11.0
spyderdsn Said:
“MacBook Pro 16”, Big Sur Unresponsive: Hi there, After week with Big Sur my 16” MacBook Pro i9, 32GB ram is just not coping well. The fans are spinning like crazy all windows lags I’m not able to work on it. My CPU load is very high & kernel-ask & WindowServer also. I’m using two 4K monitors if this makes any difference. The MacBook was fas previously just slowed down recently. I have no applications running and the load is crazy high.”
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Ok, so after further investigation. The issue is with MacBook Pro 16" overheating. On a hot day when a room temperature is 27C you basically unable to work effectively as this your laptop will overheat constantly. When this happen kernel_task will kicks in and starts throttle your mac and you can forget about working.
The normal operating temperature for the 16 inch MBP is 10°C - 35° and that is the ambient temperature range, without running an application, or application mix that drives the onboard temp beyond those specs. It would not take much heavy activity, especially on a (e.g. Core i9/64GB RAM machine), when the temp is already at 27°C, to push it beyond safe operating limits — where the operating system will throttle the Mac to protect it.
MacBook Pro 16”, Big Sur Unresponsive
