I cant download because it says ''Windows could not calculate how much space is required for installation'' Help me please!
Do you have anything plugged into the USB ports, if yes then what?
Key board and mouse
Are you installing from a DVD or an iso file (thumb drive)
Which version of OSX is this, and which machine?
Its Lion Osx and Imac 21,5
Check that you completed all of the steps required (especially formatting the Boot Camp drive)
I did that 3 times!
If you have done everything correctly and it does not work I have no further suggestions.
I got it installed before but wanted to reinstall it because it got slow. Can it maybe have anything to do with that?
I have no idea, all you have told me is that you did everything correctly, if that is true there is nothing left.
Start again from the beginning, read the directions and follow them.
I will try
Retrieving data ...