So i have a strange bug and it is not very consistent. I have two accounts on a retina macbook pro 2012 with 8 gigs of ram. I have both accounts signed in or not it does not seem to matter for this bug however it happens in both accounts. I can be surfing the web and watching a video and all of the sudden the computer will stutter by that i mean it will lock up old school style and replay the last second of audio over and over and over. The computer then becomes non-responsive to input from the track pad or keyboard. I have tried the short cuts for force quit or log out etc. none of them work. If i then close the lid the system does not go to sleep it basically reboots. I see the black screen and the apple logo with the loading progress bar. The machine does not report back to me that it was in a crash and does not generate a crash reporter log for me to harvest and trace the source of the issue. So has this happened to any of you if so what was the steps you took to fix it. I will admit freely this macbook pro has been a real gremlin since the day i got it. It has a brand new SSD and all the hardware checks out at apple both in store and "off site". I had to fight to get a new SSD as it was having I/O errors in the crash logs. So i am looking for some new thoughts, directions, favorite exorcism chants. This did not happen in the previous OS of 10.9. I had other strange issues there as state with I/O issues that were fixed with SSD. The machine would corrupt on update of the OS. So if you say go from 10.9.4 to 10.9.5 it would corrupt all data during the update, to the point recovery console was of zero use and an external usb thumb drive was required to re-format the disk and start over from scratch. This happened numerous times and i finally traced it to I/O of the SSD with zero help from apple since there little magic in store test revealed nothing. So there is a history of issues but this is a new gremlin. I have attempted to document and submit to apple.