Discrepancy in hard drive space; can I delete these files? While trying to clear space from my MacBook Pro hard drive, I noticed a 12.4 GB discrepancy between the amount of free space shown in Storage Bar in About This Mac and the total sum inside my Macintosh HD using OmniDiskSweeper (or du -sh * in Terminal). I’ve managed to account for 9.1 GB of that by running ODS as the root user.

Where could the remaining 3.3 GB be?

Can any of the major offenders be deleted to free up space? They are:


/System/Library/Caches/com.apple.coresymbolicationd/data (4.3 vs. 0 GB)
/.DocumentRevisions/.cs/ChunkStorage/0/0/ (1.5 vs. 0 GB)
/private/var/folders/zz/ (1.3 GB vs. 9.5 MB, mostly in the file CFNetworkDownload_L4uNTH.tmp)
/.MobileBackups/Computer/ (1.1 vs. 0 GB)
/.Spotlight-V100/Store-V2/ (0.6 vs 0 GB)
You can certainly delete the two temporary items in your list:


/System/Library/Caches/com.apple.coresymbolicationd/data/
/private/var/folders/zz/CFNetworkDownload_L4uNTH.tmp


Avoid deleting the folder structures but large files in these locations can be safely removed.

To be extra safe, restart your Mac first and then remove any files. The restart will ensure the files are not in use.