Downloaded Yosemite yesterday and have had problems since.. Brand new MacBook Pro Every other time I turn on my MBP it freezes at the login screen. Wifi issues, disconnects a lot. Tends to freeze from time to time and everything seems slower. Ive tried to repair the disk and the disk permissions, that didn't really seem to help. Downloaded Yosemite again from the App Store and re-installed it, that didn't help. tried to go to OS X Utilities and "reinstall OS X" but the first time it said it couldn't verify the macbook, and the 2nd time it wouldn't even connect to Wifi (no ethernet port). At this point I just want my MBP back to factory settings. Help?!