I must be doing something wrong. I’ve got CS6 on both a Mac Air and a Windows 8.1 laptop. The drive is formatted for Mac and I’m using MacDrive on the PC to read it. No issues there. I also set the Media Cache settings so that they refer to the drive as opposed to something specific to either machine.
What I get when I try to open the project that I created on the PC on the Mac is a message saying “The project contains a sequence that cannot be opened. No sequence preview preset or codec could be associated with this sequence type.”
The project is just a sequence created from an MTS camera file and a Title.