If you wish to defragment free space on a drive here’s how to do it quite easily.

Using Disk Utility, repartition your drive, giving the strict minimum space mandatory for the original volume, and soon after create a second volume with the remaining available space. that takes date, as all your input will be joined on the volume that is resized but not erased. soon after when finished, get rid of the volume you just created, giving back all available

space to the original volume. that part is fast. That’s it; you’re done.

[robg adds: I haven’t tested that one, but 10.5’s Disk Utility will supposedly allow partitioning without erasing the existing info. whether you’re going to try that tip, I strongly propose you have a good backup first, just in case things go wrong. Note that Apple states most users do not need to defragm…

Original post by Michael Rose