Currently Being ModeratedSep 8, 2011 8:34 AM (in response to dianelisa)
The start-up disk is the primary hard drive or other storage medium inside your Mac. In other words, you're gonna have to delete a few things on your computer in order to make room for the new file you're downloading.
Currently Being ModeratedSep 8, 2011 8:36 AM (in response to dianelisa)
Your start up disk is the Macintosh HD, you should right click on the disk and click get info. It will give you information on how much disk space you have remaining. You should always have 10% of your disk space as free space.
Currently Being ModeratedSep 8, 2011 8:37 AM (in response to dianelisa)
Startup Disk is your internal Mac hard drive, the thing that makes your computer go. If you have lots of music, video or pictures stored on your Mac, that may be taking up lots of space.
You can download a program called Grand Perspective that will show you what's taking up the most space. Then you will need to find some way of copying that stuff off to either a flash thumb drive or an USB external hard drive to make more space available.