That sucks. I've used TrueCrypt for Windows and LUKS for Linux, but have never been a Mac guy so I haven't looked into that side of things. Google suggests that

That sucks. I've used TrueCrypt for Windows and LUKS for Linux, but have never been a Mac guy so I haven't looked into that side of things. Google suggests that your main options are OSX's built-in FileVault to encrypt just your home directory (and optionally TC or something for additional non-system data), or PGP Whole Disk Encryption for a whopping $150. Or running a virtualized OSX within an encrypted container within a second OS, with all the extra boot time and performance hits that would entail. I'd bet on something better coming out before too long given more interest (and laws) about encryption these days, but unless I've missed something, for now it looks like you're pretty much of out of luck for as good, complete, free solutions go.