-10011 error logic X computer overload with a mac pro 6 core 2012, 16 gig ram, 2 sad. What is the real problem and the real solution ? Thx

The real problem is that nobody can magically look under the hood of your Mac to see what's going on. Your question is useless in it's current state.

Logic is a program that is open-ended in processing power it requires, meaning that it can be set up so it'll overload any computer, regardless of how much RAM or how powerful a processor it has.

The real solution is to either redistribute the CPU-power used, and/or to be more economical with processing power (remove unused plugins, avoid having a Software Instrument track selected during playback, choose a larger I/O buffer size and Process Buffer Range, etc.).

Also, I don't know what you mean with "2 sad". Is that your state of mind, or are they "solid affair disks" perhaps?