Can I use a PGP Whole Disk encrypted USB device across both Windows and Mac OS X systems?
Yes. Removable drives encrypted with PGP Whole Disk Encryption are interoperable between Windows and Mac OS X platforms. So for example, an individual can encrypt a removable drive using a passphrase or a public key on Mac OS X, and when this drive is inserted on a Windows system, the user would authenticate via a configured passphrase or key.