Update not working for iMac OSX
I recently bought the new iMac OS X and have been trying to use GarageBand but am having trouble with certain instruments. When selecting strings or sound effects, for example, the programme indicated that an update was required to use these. After selecting to update the update section opens and indicates that there are no updates available. When I go back to GarageBand I get this message when I try and use the instruments 'The software Instuments or Apple Loop selected is currently being installed. You have already initiated the installation of additional content for GarageBand via Software Update. For additional information please open the 'Software Update' application.'
I have searched online but cannot find any solution to this and have tried rebooting the computer but to no avail. I am getting frustrated and would be very grateful for any help'
Guffer
iMac, OS X Mountain Lion (10.8.2)