I've erased tons of pictures and programs from my mac and when i go to software update it still keeps telling me i can't update because my startup disk is full
Visit The XLab FAQs and read the FAQ on freeing up space on your hard drive. Also see Freeing space on your Mac OS X startup disk. However, the best alternative is to put in a larger hard drive.
Note that dragging files to the Trash does not remove them. You then have to Empty the Trash to free up the space.
Retrieving data ...