4 Replies Latest reply: Sep 7, 2012 3:55 PM by roam
ppmazm Level 1 (0 points)

I removed this package and the USB storage devices stopped work Properly But when I restore the package the following massage appears:


System extension cannot be used

The system extension "/System/Library/Extensions/IOUSBMassStorageClass.kext"

Was installed improperly and can not be used.

Please try reinstalling it, or content the product's vendor for an update.


Anybody help me out.

Mac Pro, Mac OS X (10.7)