Just wondering should I be worried about this on my 2012 cMBP running Yosemite. Does this sometimes when first starting up before or just as it's going to the log in screens. Doesn't do it every time and I don't think it's ever done it when any of us are logged in and running.
https://dl.dropboxusercontent.com/u/47540861/Macbook.m4v
Did the video above and then went to this..
https://dl.dropboxusercontent.com/u/47540861/Macbook.m4v
Did the video above and then went to this..