Enjoy your new iMac and Yosemite. While you are waiting for it to be delivered it would be an opportune time to be sure all and I mean ALL of your applications, kexts, etc. are up to date and make a list of those you will need to update after you are running Yosemite. The most common glitch with Yosemite is out of date software.
If we knew what it was we were doing, it wouldn't be called research, would it?
