I can confirm 100% that this was the genius bar's fault for not wiping the mac back to a stable os build before processing the repair.<br>Apple already specifies that beta versions must be replaced with the current stable/release build of mac os before diagnostics are run or a hardware repair order is opened.,(reply>), There is an issue with the OS release itself.<br>I had a logic board replacement specifically for this issue, and that totally new one died right as they were installing the OS.