If the Mac is able to recognize the hard drive on the PC, then yes. However, the catalog has to be on the Mac.
Thanks Jim. if the 2 computers are on the same network, can I move the catalog to the Mac? I wont use the PC eventually.
Yes, you can move the catalog to the Mac. But bear in mind that if the drive holding your images is referenced differently on the Mac it will be necessary for you to find the missing folders.