Logic Pro X keeps crashing

My Logic Pro X continually crashes. Just shuts down without any seeming cause. Not just Logic Pro X crashes, but it instantly and simultaneously shuts down the iMac as well! I have every app turned off except for Logic Pro X but I also get (along with the "without-notice" crashes) some that say "System Overload". I do NOT have a lot of junk, nor do I have a lot of thins working in the backgorund. I thought Mavericks was supposed to "compress" memory and reduce the workload. Doesn't seem to work on MINE! I am running a brand new iMac with 8 Gb memory, so why all the crashing? It does save my work automatically when it dies, but this is crazy. I don't remember Logic Pro 9 EVER craashing. Any ideas of what is causing this. P.S. I am not the average idiot who doesn't have a shred of computer knowledge. I actually work on Macs and that's why this is such a mystery as to why Logic Pro X goes into sudden death every few minutes. Any ideas are welcome.