I use a KVM switch at home to toggle between multiple systems. When i switch to another system, then eventually back to my Mac Mini, there is a lag in it detecting a mouse/keyboard is attached. Sometimes the lag is up to 20 seconds. My other systems (Win10/Linux) recognize them immediately. Is there a setting I can tweak to tell it to detect sooner?
Sounds like something has changed, the OS obviously. Maybe there is some other new/changed software on the mini that is interfering. (?)
You could try these quick tasks to see if they make a difference:
Reset the NVRAM on your Mac – Apple Support
Restart in safe mode to (troubleshoot) – Apple Support
What safe mode does:
Restarting in Safe mode can often eliminate a problem or help identify the cause.
You can verify that you have started in Safe mode by clicking Apple menu > About This Mac > System Report. Then find >Software< in the left column and look at >Boot Mode: Safe vs Normal< in the right pane.
Note– starting up in Safe mode could take 10 minutes or more. Be patient.
If the problem goes away while in Safe mode, then restart your Macintosh and re-evaluate the issue.
Hello, beerman2013.
The short answer to your questions is no, there is no setting to speed the detection of the input devices.
I'm wondering if the keyboard and mouse you are using are Windows PC versions that the Win/Linux machines readily identify.
Do you think the lag might be due to the mini having to identify non-Apple USB devices, something it would normally do at startup?
Have you tried this with Apple keyboard and mouse?
I don't have any Apple keyboard/mouse. It used to not do this, but after an OS upgrade (can't remember which one) is when it started, so something changed (all hardware is still the same).
Mac lag in detecting USB Mouse/Keyboard when using KVM
