Problems launching Classic with OS 9.2.1: USB Mouse extension? After updating to Mac OS 9.2.1, J.P. Monahan had the problem where Classic would not launch in Mac OS X anymore (see also our Mac OS ...

USB problems continue We continue to report on significant issues with USB devices, apparent after the recently released Intel-based Mac EFI firmware updates. These include system sluggishness that ...

Check your mouse hardware first by trying a different USB port or changing the batteries. Update your computer's drivers to fix any lagging issues with the mouse. Turn off features in the settings ...

A recent Apple support note tells a tale: depending upon the particular USB setup, the placement of USB hubs, and how the keyboard and mouse are connected to the system, users may experience ...