iMovie 10 dangerous?
People with a harddrive that is more than half full with old iMovie events are reporting that the size of the old iMovie events + the size of the new iMovie 10 library is LARGER THAN THE SIZE OF THEIR HARDDRIVE.
Also I can confirm that "updating" large iMovie event libraries takes place FASTER THAN IS POSSIBLE. For example, let's say you have 500GB of old iMovie events and you "update" them. iMovie 10 will create a roughly 500GB "library" file in a minute or two. It is physically impossible for any mac to write 500GB of data to an external hard drive in a minute or two.
This implies that iMovie 10 isn't really creating a large new "library" file/folder that contains all your old movies. It's somehow pointing to those old movies while creating a fake library file that looks big but isn't.
So when is it really safe, if ever, to delete your old movies?
What happens if you copy this library file to another hard drive that doesn't contain your old movies?
How much hard drive space do you need to buy to fit your old movies plus this new fake library file?
All this needs to be explained.
MacBook Pro, OS X Mavericks (10.9)