Cubase 7.06 has been little unstable for me on both 10.8.5 and 10.9, i think this is a Cubase prob since it has been rock solid for me up to 7.05. however, i had to reinstall Mavericks on my mac pro, because of system slowdowns, wifi probs etc. Its running fine again now after a clean install.
Im well aware steinberg dont recommend installing cubase as of now, - i am between projects, and wanted to try. I dont feel theres much speed increase or better cpu performance anywhere, but it doesnt feel slower also. Im looking forward to the updates on both Cubase and Mavericks.
About me, im not very active in the forum, but i been using Cubase since version 1.02 on the Atari.