Mac OS Xodus
(First, yes I do realize the ‘X’ in ‘OS X’ is pronounced “ten” not “ecks.” I simply like the portmanteau.)
With the release of Leopard, I discovered the need to migrate my existing Tiger system onto an external drive. I needed it to be bootable, and I wanted to have a little discontinuity as possible. Apple generally makes this pretty easy, but it’s still a bit involved. I write this article from my migrated system, currently booting Tiger off of a USB drive.