Hey all, got my first retina macobok pro 2015 this week. about 3 times in 3 days, the computer would completely lock up, forcing me to do a hard reset. sometimes while using the laptop, sometimes when trying to wake up the screen from idle power saving after a few minutes of not using it. while not not catastrophic, very annoying and worrysome that it might happen while i am doing something very crucial. so far I have just been using chrome and messages ( i have yet to setup all my audio software from my desktop). I exchanged the MBP already twice, all of them have the same problem which makes me think it is a sierra issue on 13 inch 2015 rMBP? all three are certified refurbished from apple. anyone else had this issue before? I have tried to go to Console app to try to find logs of what happened but i am new to the app and the only thing i can find in the logs is logs since the last reboot which is AFTER the issue happened which made me do hard reset I found the "system.log" there a ton of stuff... what do i look for?