Worked.
Ran for 9 minutes then restarted... Root.
Many thanks to OP.
I'd spent 10+ hrs looking for a way to root w/my PowerBook.
Can't believe I didn't find this earlier.
1) DL'd APK... Google search
2) Used Astro to install
3) Ran app from "drawer"
Couldn't get much easier, I don't think.