The instructions for the Mac didn't work for me. I'm using Mac 10.6 (Snow Leopard). My steps:
1. Copy the bundle file as described.
2. Open system preferences, then select Language & Text
3. Under input sources, select the minimak option of choice.
4. Make sure the "Show input source on menu" option is selected.
5. Set the keyboard of choice by clicking on the flag on the top right of the screen.
I'll see how this works on my MacBook, which is the latest operating system.
p.s. This is my first bit of writing using Minimak (going the recommended route, starting with Minimak-4)
I'm glad I found this site, I had thought about Dvorak, but it looked like a steep learning curve, and then found out about Colemak when installing Mac Mavericks, a friend knew about it but didn't like the remapping of x-c-v, and further research led me here :)