Hello everyone! I have talked my Union into buying an iMac to replace their old PC. They are very interested but have some legitimate concerns that I told them I would research and obtains answers through this forum. The first concern is networking. Is it easy to network a PC and MAC so that they talk to each other? Second concerns sharing an external hard drive. I know that both Windows and Mac require an external drive to be formatted to their specs. For instance, Mac Journal vs. NTFCS (if I remember the Windows format correctly). So, can they both share an external drive hooked to a network? And by what I mean "share" is to read, write and save with either computer so the other is able to retrieve and do the same. Really appreciate the help. It will be very useful to convincing my Union to go MAC.