Open Activity monitor
Highlight the offending process
Click "Inspect"
There should be an "Open Files and Ports" tab that displays all open resources involved with this process
/
/System/Library/Frameworks/QuickLook.framework/Versions/A/Resources/quicklookd.app/Contents/XPCServices/QuickLookSatellite.xpc/Contents/MacOS/QuickLookSatellite
/System/Library/Frameworks/Security.framework/PlugIns/csparser.bundle/Contents/MacOS/csparser
/Applications/DraftSight.app/Contents/Library/QuickLook/FxQuickLookDrawing.qlgenerator/Contents/MacOS/FxQuickLookDrawing
/private/var/folders/n1/4ssvhrtj29n43w7yfvvc_dr40000gn/C/com.apple.LaunchServices-036501.csstore
/usr/lib/dyld
/private/var/db/dyld/dyld_shared_cache_x86_64
/dev/null
/dev/null
/dev/null
count=1, state=0x2
/private/var/db/DetachedSignatures
->0xa662148efe789143
Seems it is stuck on creating a preview image for DraftSight (CAD programme). Now to figure out how to stop it.
Don't try to force quite. Now I have two! I have a very expensive room heater at the moment!
Yeah, it's DraftSight, on page two of that Apple Support discussion I posted, it says that deleting the qlgenerator will do the trick.
I had the same problem and it appears to be the DraftSight QL generator. I wasn't sure how to find/delete it, but was able to do so: navigate to the DraftSight application (in the applications folder), hold down "control" key and click on the DraftSight application, select "show package contents", look in Contents?Library>QuickLook, and drag the FxQuickLookDrawing.qlgenerator file to the trash, log out or restart, then you'll be off and running.