Just copy them to any Mac Formatted drive then double click on any one of them to make it the default Library.
Before you do that Quit Aperture, hold down the Option and Command keys and start Aperture. Run Rebuild on each Library, to choose each hold Option on start. Let me know if you need help with that. If not and if you are satisfied, please kindly provide an OK or Above Rating - so I get paid. Keep in mind you can always come back to this page at any time regarding this question. Thanks!!
Do you still need help?