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Smart Previews and Mac HD System Space

vtanzi

New Member
Joined
Dec 18, 2018
Messages
7
Lightroom Experience
Intermediate
Lightroom Version
Lightroom Version
8.1
Operating System
  1. macOS 10.14 Mojave
I selected to use Smart Previews--suddenly my Mac HD space became extremely low. It says my Mac System is taking up 740 GB? Is that possible? Any fixes?
 
Joined
Jun 24, 2010
Messages
1,687
Location
Encinitas, CA USA
Lightroom Experience
Advanced
Lightroom Version
Classic
Hi,

You probably do not need to use Smart Previews. Building them will use up quite a bit of additional disk space on the hard drive where you have your catalog. Smart Previews are primarily used when you want to be able to edit your images but not have to have the original files online. For example while traveling. They are effectively a compact duplicate of your original images.

You can see how much disk space is being consumed by your Smart Previews by opening the File Handling tab of your "Catalog Preferences". Accessible from the Lightroom menu.

To remove Smart Previews use the menu: Library->Previews->Remove Smart Previews...

You will need to select an appropriate source for example if you select "All Photgraphs" first this command will give you the option remove all the Smart Previews from all the images in the catalog. You can limit this by selecting smaller subsets from your Folders or Collections.

-louie
 
Joined
Jul 2, 2015
Messages
11,304
Location
Netherlands
Lightroom Experience
Power User
Lightroom Version
Smart previews are only about 1 MB each, so I find it hard to believe they have anything to do with this problem. Do you use backup software like Apple Time Machine or Carbon Copy Cloner? That software can create a temporary backup file on your hard disk if the destination is unavailable.
 
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