I have a 2019 16 inch Macbook Pro with 2.3 Ghz 8-core Intel Core i9, 64GB mem
Since upgrading to MacOS Sequoia 15.1 I've noticed severe lag when I unplug the AC adapter and go mobile (eg. roaming around the house).
The lag appears to be really noticable when multitasking. In other words doing several things at the same time, such as watching a video, while checking social media, and editing a presentation at the same time. The keyboard responsiveness degrades. It takes several seconds for the touch bar to respond to touch (eg. changing audio volume level of a video). And switching between apps is slower.
After digging a little deeper, it seems like the CPU clock speed is being capped to something between 800 Mhz and 1 Ghz whenever I unplug the AC adapter, and run on battery.
In the attached screenshot iStat menus is reporting the clock speed at 940 Mhz and all processors at nearly 100% while I'm watching a video, and switching between other browser tabs and Telegram.
As soon as I plug the AC adapter back in, the lag goes away, and performance returns to normal.
I was thinking this could possibly be related to battery health, but as the following iStat menus screenshot shows, the battery health is 100% with only 51 charge cycles.
Running '
The PROCHOT seems odd, as the iStat menus clearly shows processor temps are low (below 50 C).
And, as I said... as soon as I reconnect the AC adapter, the lagging goes away.
EDIT: In System Settings -> Battery, I have Low Power Mode set to "Never"
Anyone else out there on an Intel Macbook seeing this sort of behavior after updating to MacOS Sequoia 15.1?
Anyone else out there with an Intel Macbook seeing this on earlier MacOS releases (eg. 15.0 or 15.0.1)?
Since upgrading to MacOS Sequoia 15.1 I've noticed severe lag when I unplug the AC adapter and go mobile (eg. roaming around the house).
The lag appears to be really noticable when multitasking. In other words doing several things at the same time, such as watching a video, while checking social media, and editing a presentation at the same time. The keyboard responsiveness degrades. It takes several seconds for the touch bar to respond to touch (eg. changing audio volume level of a video). And switching between apps is slower.
After digging a little deeper, it seems like the CPU clock speed is being capped to something between 800 Mhz and 1 Ghz whenever I unplug the AC adapter, and run on battery.
In the attached screenshot iStat menus is reporting the clock speed at 940 Mhz and all processors at nearly 100% while I'm watching a video, and switching between other browser tabs and Telegram.
As soon as I plug the AC adapter back in, the lag goes away, and performance returns to normal.
I was thinking this could possibly be related to battery health, but as the following iStat menus screenshot shows, the battery health is 100% with only 51 charge cycles.
Running '
powermetrics' while the lagging is occurring shows the performance is being limited. I see the following in the 'powermetrics' output;
Code:
Performance Limited Due to:
CPU LIMIT PROCHOT
GPU LIMIT PROCHOT
GPU LIMIT SPARE_GT_13
CPU/GPU Overlap: 13.85%
Cores Active: 46.07%
GPU Active: 25.98%
Avg Num of Cores Active: 1.27
....
**** SMC sensors ****
CPU Thermal level: 21
GPU Thermal level: 8
IO Thermal level: 0
Fan: 1844.58 rpm
CPU die temperature: 44.85 C
GPU die temperature: 35.00 C
CPU Plimit: 15.87
GPU Plimit (Int): 2.39
Number of prochots: 0The PROCHOT seems odd, as the iStat menus clearly shows processor temps are low (below 50 C).
And, as I said... as soon as I reconnect the AC adapter, the lagging goes away.
EDIT: In System Settings -> Battery, I have Low Power Mode set to "Never"
Anyone else out there on an Intel Macbook seeing this sort of behavior after updating to MacOS Sequoia 15.1?
Anyone else out there with an Intel Macbook seeing this on earlier MacOS releases (eg. 15.0 or 15.0.1)?
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