In my Aquamacs the scratch buffer has a file location where I can save random notes, and it's located in
USERNAME/Library/Application Support/Aquamacs Emacs/scratch buffer
I'd like to sync this with my other emacsen, but I can't find where (or if) the scratch buffer for 'normal' Emacs is saved.
Edit Thanks, Slomojo. I ended up putting this in my .emacs and it works as hoped:
(setq initial-buffer-choice "~/Library/Application Support/Aquamacs Emacs/scratch buffer")
I think the Aquamacs philosophy of the *scratch buffer* is just different from that of 'normal' emacs.