I'm curious about the new mac version which I haven't downloaded yet.

I'd like to know first if anybody is having issues with it?
It's probably okay with Mountain Lion but does it run better with Mavericks?
Any comments on Mavericks. I don't think I'll be able to use it because some of my older apps won't work with it.(like iPhoto 8)

My real fear is it won't work on my SnowLeopard Macbook.
I have version 2.8(3951) and have issues with the repeat window mysteriously having double and triple digit repeats that really slow it down.
The work-around is to loop the whole thing.
It does show up in the app store as downloadable but it want's to charge me $19.99.
On my Mountain Lion iMac it's a free update?