I finally got it up and working in 10.9 DP7.
Many users were having trouble with QTKITSERVER, basically the Quicktime component for Quicklook viewing of media in Finder. "Activity Monitor" was listing numerous QTKITSERVER and ORIGIN apps as frozen but unable to force quit, requiring users to logout.
Additionally, a few third party app's do not play well with Origin:
- Climate: An OS X Menubar app for "Nest" thermostat monitoring/control
- Chronicle: Financial app
- VLC Streamer
Before loading the game, I closed about every app I didn't need, worked like a charm.
Either I haven't played a PC game in years or I'm easily impressed but WOW. This SimCity is amazing, the graphics, lighting, detail, sound - I turned the settings on high playing on my 12-Core Mac Pro with 2 27" displays, and it's amazing. I was able to get it full screen after experiencing the "grey" or black screen upon launch, don't know how, just clicked away. The trackpad scrolling is smooth and the animation is fun. Feel like a kid again.