Mounting .DMG disk images has been getting slower and slower on my 10.2.6 machine, to the point where it took at least 15 seconds to open any DMG. I figured the OS was caching mounted volumes or something, and searching a bloated cache was causing the slowdown. Sure enough, I
sudo rm'd the Library/Caches directories from
~,
/, and
/System, restarted, and now DMG mounts are back to a couple of seconds.
[
robg adds: The actual command to do this would be:
% sudo rm -r ~/Library/Caches /Library/Caches /System/Library/Caches
You won't permanently hurt anything by removing the cache files, but you may notice that it takes longer to open large directories (for example) while the cache files are rebuilt.]