Hello,
First thing off the bat, here's my specs:
Macbook Pro Mid 2014
2.6 GHz i7
16GB Ram
Intel Iris Pro
Adobe Premiere CC2014 8.0.1(21)
I've been able to crash Premiere quite a few times by messing around with png files. By crash, I mean bringing the entire system down, not just the program itself. Resizing them, putting a matte on it, moving them around, any of that happening will completely force OS X to GSoD and boot again. For whatever reason, there is a massive problem with the way Premiere handles .PNGs on my system.
I am doing quite a bit of workload and multitasking. I nest sequences and use a lot of dynamic linking with After Effects, but it always happens when I try to work with .PNGs. My coworkers are running into various other problems that I personally haven't experienced. We all have the same laptop. What I'm worried about is that that this is possibly a video driver error that's on OS X's side and they're not going to fix it any time soon because of the incoming release of Yosemite.
CC2014, I must say is a huge regret for our company to update to. We generally like Adobe Products, but this is all incredibly disappointing and aggravating. To keep ourselves in good spirits we've set up a tally board for how many times we've crashed Premiere or After Effects. We try to break that record each week. So far the high is 22 times a week between the three of us. That was two weeks ago. Since the latest update, we've only had 5 crashes this week. Looking forward to the next update!
Side note, whatever it is that the Spotify app is doing that is preventing me from using the dropper tool in After Effects, is also really bugging me. I've seen people mention it a few times and I too would like to throw my hat into that same ring.