PT 8.0.3 Update error
 

This is a new one. Running Mac OSX 10.5.8, 2.16GHz processor 2 GB RAM (PT already works, just want to update). In trying to run the updater, I get "The installer could not install some files in '/'. Contact the software manufacturer for assistance." I don't have any folders labeled "/", never have. I'm trying to install in a Mac Lab in a university, all the other computers have been fine, so I'm at a loss as to what this problem is. Any suggestions would be greatly appreciated. Thanks.

MGA