Touchpad lag and keyboard lag

Welcome Touchpad_Lag,

What processes or apps are running when this occurs? We ask because there is likely an app or process running higher than expected usage. To determine this, go to the Finder > Applications > Utilities > Activity Monitor. Check under the CPU tab. What process or app is running at the top here?

Does it help to close this app and test it out?

Resources: Activity Monitor User Guide for Mac - Apple Support

Quit an app or process in Activity Monitor on Mac - Apple Support

If your Mac runs slowly - Apple Support

Quit an app or process in Activity Monitor on Mac

You can use Activity Monitor to quit a process, even if it’s in a loop or not responding. You can also send a signal to a process to terminate it. If you attempt to quit a process you don’t own, you may be required to authenticate as an administrator.

1. In the Activity Monitor app  on your Mac, under the Process Name list, select the app or process you want to quit. An unresponsive process is marked with (Not Responding).

Note: The Process Name list is not available in the Cache tab listings. 

2. Click the Stop button  in the upper-left corner of the Activity Monitor window (or use the Touch Bar).

3. Choose one of the following options:

- Quit: This is the same as choosing File > Quit within an app. The process quits when it’s safe to do so. If quitting the process could cause data loss or interfere with another app, the process doesn’t quit. 

- Force Quit: The process quits immediately. If the process has files open, you may lose data. If the process is used by other apps or processes, those apps or processes could experience problems.

To see if a process is used by another process, choose View > All Processes, Hierarchically.

Hoping to hear back, cheers.

Touchpad_Lag,

We appreciate you following up with that information!

Have you had an opportunity to run the Apple Diagnostics test to ensure there is no hardware issue yet?

Those steps can be found here:

Use Apple Diagnostics to test your Mac - Apple Support

If the Apple Diagnostics test confirms that the hardware is operating as expected then next we would recommend completing a full Time Machine backup. Those instructions can be found here:

Back up your Mac with Time Machine - Apple Support

Take care.

Hi Touchpad_Lag,

Thanks for running the diagnostic test. Since you have created the backup, the next we'd recommend would be to erase the Mac and reinstall the macOS by completing the steps listed here: Use Disk Utility to erase an Intel-based Mac. After completing the reinstall, please test for the issue again.

Best regards