My Macbook came with a 250Gb hard drive. Out of all of that i was allowed to around 238 gb. Im assuming the other 12 gb went to the OS and the apps installed. I have not installed anymore apps since then and my hard drive says that is has only 235.85. Its not a big amound of hard drive but i dont know why it keeps getting smaller. Does anyone know why it keeps showing less space every time???