Impossible to delete the Cache of the Preview on LR4 (Mac 10.10.3). Message says it's 'in service '.

I use on Mac 10.10.3 LR4. My catalog is on an external HD LR (iOmega 1 TB) stops due to the "error in the reading of the preview cache and must stop."

I read on previous forums I need to delete the cache of the preview.  I found this file (in the same folder that the Lightroom - the preview cache named catalogue ends with Previews.LRDATA.) and put it in the trash.  HOWEVER, it will not erase.  I get the message: "the operation cannot be completed because the item"LR4 catalogue on MacBkPro Previews.lrdata"is in use.  Help!

I see this once in awhile on my Mac with other files where I can't empty a file out of the garbage with the same error message.  For example, sometimes sound when I drag a photo to email to send to someone and then try to delete and remove the photo from the trash.  Its not actually used, but it does not remove the trash.  A COMPLETE computer restart is the only way to solve the problem.  I don't worry about trash what is until I do a restart.  This habit of can't do not until Yosemite is out and it is still happening in El Capitan. It is another example of the quality of Apple's OS fast downhills.

Tags: Photoshop Lightroom

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