http://blogs.systweak.com - Almost every Mac user suffers with a problem in Mac which is the startup disk is almost full. But good news is that there is solution available for this. You can fix this problem using some utilities on mac and you can also use some software.
Disk repair will run automatically. To see what all Disk Utility is removing from your system, you can select ‘show details’ option and vice versa.

Remove Unnecessary Applications: There must be many unused applications on your Mac. You should remove all these applications. Just chuck them to trash and free up some memory from your Mac.