Archived posting to the Leica Users Group, 2009/04/15

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Subject: [Leica] OT: Lightroom taking up space on iMac?
From: reid at mejac.palo-alto.ca.us (Brian Reid)
Date: Wed, 15 Apr 2009 16:50:09 -0700
 
Lightroom does a lot of cacheing. It also uses big scratch files.
If it should crash or be interrupted in the middle of doing something large, 
it sometimes won't delete the scratch files.

If you're on a Mac you can find out what's there by typing this strange 
command into a terminal window:

du /private/var | grep "Cleanup At Startup"

All of those files will vanish the next time you reboot the computer, and 
many of them will vanish the next time you "optimize and relaunch".

Photoshop does this a lot more than Lightroom. If photoshop crashes because 
you gave it something to do that's too big for your computer (Hi, Elizabeth) 
then you should either reboot or go into the "Cleanup At Startup" folders 
with a back-hoe.