some help please

I recently switched to a new imac, which is awesome. I only have one problem with garageband. I click on the little eye icon to show the loops and a message pops up saying my system doesn't not have any loops, please reinstall. I reinstalled the loops and garageband, to still face this problem. The loops are on my system, in hd/library/audio/apple loops/apple/apple loops for garageband. They are on my system, but garageband cannot find them. Ive tried turning off filters and whatnot but nothing happens. Is there anything I can do?