Not in all cases, is recommend do you use keyboard/mouse as USB, but in lappies, need have ACPIPS2Nub installed to work Trackpad/Keyboard and external USB mouses and keybs.
Originally Posted by drfgb3
FTW, put ACPIPS2Nub on a pendrive, boot your OSX DVD and open Utilities/Terminal, put .kext in:
Reboot and see this work.
cp -r /Volumes/YOUR_PENDRIVE/ACPIPS2Nub.kext /Volumes/YOUR_LEO/System/Library/Extensions/
chown -R root:wheel /Volumes/YOUR_LEO/System/Library/Extensions/ACPIPS2Nub.kext
chmod -R 755
rm -rf /Volumes/YOUR_LEO/System/Library/Extensions.mkext