I found that answer too...

I understand what you mean, but the method you plan on using is exactly what we don't want to use. Anyone can chop/rearrange their loops in order to fit in a new time signature, but that may be just TOO time consuming!
It's okay, though.
I'm satisfied as it is
Hi There,
Not sure what you meant by anyone can chop/rearrange their loops, because I'm not talking about cutting up loops. Rather, I'm talking about the quick process of using an existing time signature using a *software* track as the base of a more complicated one, adding some beats in software, and then simply copying and pasting that amended bar.
In the case I was talking about above, I just put the right bols (beats) in over the course of two 5 beat bars, then copied this a few times, joined the copies, and had several minutes of beats. Even quicker would have been to use the semi circular tool to create a loop, but I don't like doing that because I like to change the velocity of some of the beats to give it a more human feel. So, I just go in randomly and alter some of them.
As I said, the whole process is very quick, so I don't understand the problem that you have with it.
Also, I see a lot of people here trying to shoe-horn Garage Band into doing things that are a lot easier in other, more powerful sequencers/DAWS. Why not just use the others?
If you're just looking for more time signatures, one thing you could do is go through the process of creating all of the ones you want, and use them as templates in the future. You'll only have to do this once.
Of course, it won't work for things like the North Indian talas which I'm into which have things like a 1 1/2 beat time cycle, but you'll be able to create most of the Western time signatures.
Hope this helps