I apologize but I did not have the time to read through the entire thread. Just want to throw my hat in the arena and say that there is indeed something wrong with 10.9. I have 16GB of RAM and running Aperture 3.5.1 earns me the dreaded out of application memory problem. 16GB of memory chewed up by the kernel and Aperture! Seriously, Apple??!!
We had the same crap happen with Aperture 3.something with one of the Lions. It took months for Apple to acknowledge the problem (and even longer for the fanboys to get over it .....)
Not to mention that the "fixed" multi-display mode broke a number of other applications and changed my workflow.
I hope it gets fixed faster this time around. On the other hand, I shouldn't be whining. Nobody put a gun to my head to abandon a stable, working version for the latest and greatest, even if I thought I QA tested it thoroughly ....
One more thing: as soon as I kill Aperture 3.5.1, the kernel size drops from huge to 1.5 GB (which is still too much, if you ask me). Since others are experiencing the same problems using other Apple apps, it seems logical that the problem is in a component that all of them use or rely on.
Message was edited by: sorinfromtoronto