Hello guys, I have a MacBook White Unibody 2010 2.4ghz with 4gb RAM. I'm using Yosemite (up to date) my problem is, I have to wait for the video bar (let's say watching Youtube) to fully load before I can watch it? If I don't it stutters, and is unwatchable. I'm on Sky Fibre, so I'm sure it's not that? Any help would be greatly appreciated. Thank you.