Improve Activity Monitor Reporting Speed in Mac OS X with Update Frequency
Many advanced Mac users have noticed that Activity Monitor appears slower these days when the app is updating CPU, Memory, Disk, Energy, and Network data, with the monitoring app apparently no longer offering real-time system resource statistics.
Instead, Activity Monitor now defaults to offering a general aggregate of system use that feels relatively delayed. Well it’s not in your head and it doesn’t just feel delayed, it actually is delayed, as the new standard setting for Activity Monitor no longer updates system stats and usage every second or two, it waits a full five second before updating the app. While this provides a broader average of performance and resource usage, it may be inadequate for many advanced users who are accustomed to a more responsive task manager.
For those who prefer to have more real-time resource data on their Macs, you can adjust the change interval back to the more aggressive reporting speed that existed prior to the change that arrived with newer Mac OS releases.