I知 utilizing Apple iMac from six months. I知 actually struck with its characteristics and functioning. I similar to finish my totally work of office in this laptop only.Lately I知 confronting a trouble about hard disk of my laptop, so I charge about this trouble to Apple company. They send me en email in that they were declaring that apple user can substitute there western digital hard disk to Seagate One TB hard disk. But I do not conceive in apple commitment. So I determined to go with my own expenses for upgradation. So friend I demand total data about this Seagate One TB hard disk for laptop.