I got my new rMBP yesterday and set it up last night, I shut it down then when I turned on it booted up and the white apple logo appeared like normal then vanished for half a second then reappeared and loaded up Yosemite right after. It was about 7 seconds to boot time like usual, but just wondering if the apple logo vanishing for that split second is an issue. Thanks. sorry for the weird question, I just spent a bit on this computer and want to make sure it works like it should. *first world problems. lol Kal.