I have a program that has both Mac And Windows version pressed on a single CD but when I put it in the Mac it pops up but It will not mount on the Windows side. If I boot in to windows (bootcamp) I can read the disk fine in the windows environment... I had to copy the installers off the disk onto a network drive. Then when I reboot into OSX and open PWS I was able to install the program into that version of Windows from my network drive.