try this:

applications->utilities->disk utility. Highlight the root disk. Do "Verify disk" first,and if necessary, do "Repair disk". 

所有跟帖： 

• You may also want to try the same for the individual disks, if t -just4fun2007- ♂ (0 bytes) () 03/29/2012 postreply 07:07:12

• You can use the "Time machine" app to backup the whole disk, -just4fun2007- ♂ (75 bytes) () 03/29/2012 postreply 07:11:21

• 謝謝！我沒點verify就直接點了repair.然後沒發現多大區別，但firefox不能用了，隻能Safari了 -xinliji- ♀ (21 bytes) () 03/29/2012 postreply 13:40:22