Yesterday I apparently interrupted Disk Utility when it was erasing free space, which was far bigger than the used space on my beloved black Macbook. Apparently the free space, because the program was interrupted, is seen as one honking big file. Please help me get the laptop to recognize all the free space. This morning, the disk utility tells me that I have zero free space. Verify says I do not need repair. I checked because of all my sudden problems (I am unable to save anything to the laptop, unable to cut-and-paste . . . and unable to erase free space again since there officially isn't any, etc.). Trash is empty. I tried (based on advice in another thread) to reboot with the installation disk so as to use its disk utility program, but the installation disk menu offers "install" etc. but not (as far as I can tell) just access to its disk utility. I plugged in my Timemachine external drive [WD MyBook], but the most recent "save" there has the "restore" button greyed out. That's scary. I'm willing to do a complete re-install if necessary, but I hope that one of you has a simpler solution that will simply get my free space back. Thank you!