Will SD work with a password protected 'wake up'?
 

I'm considering buying SD, and I want to schedule backups for the middle of the night, when my old-style MacBook, running 10.5, can be made to wake up a minute before SD runs though the OS X Prefs.

However - while I'll be logged in as a user, I probably won't be there to type in a password on the 'wake up' screen. Will SD run regardless?

No: you'd need to not have a password protecting wake.

Thanks for the quick answer, even though unfortunately it's not the one I wanted!