I have been put incharge of all the Macs we are getting here at the university and they have purchased a MacBook Pro for me which is giving me trouble. We have installed parallels and that works fine but when you restart the computer it give a "No Bootable Device found. Insert Disk and press any key" error. If I restart it again holding the option key it gives me the option to boot into OSX but it will not boot into OSX normally anymore. How can I fix this?