Haukipudas If you wondering what to do if your macbook after update from OS X Mavericks to OS X Yosemite is VERY SLOW, the answer is simple – buy new MacBook or upgrade hardware (not sure if it works). We did research in company who has many 2011-2012 Macbooks with 2.8 GHz Intel Core i7, 4GB or 8GB memory. […]