Lightroom 5: Very slow - performance issues on powerful Mac Pro.

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  • Problem
  • Updated 3 years ago
  • (Edited)
I'm currently switching from Apple Aperture to Photoshop Lightroom 5. This is just a general feedback about the performance of Lightroom.

My workstation is a Mac Pro, 3.5 GHz 6-Core Intel Xeon E5 with 32 GB RAM.

One should expect any application is running very fast on this machine. Actually Apple Aperture does, I get an immediate feedback for every change I do. Woking with Apple Aperture feels lightening fast and great.

Now I'm using Photoshop Lightroom 5 on the same machine. Everything feels slow and delayed. I often have to "hold" the slider, and wait a second or two until I can see the result.

I imported 300 photos into the catalog. It was very slow, it took minutes to create the previews. Neither the CPU nor the RAM of my machine was used. It seems Lightroom is only using one CPU core for all the processing. I would expect importing 300+ photos would be a simple task to run parallel on multiple CPUs.

The quality of the application on the other hand is very good. The filters are great and produce great results, but while I'm working with this tool, it seems it can not really use the power of my computer and this is very frustrating.
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Ope Gato Cedo

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  • frustrated

Posted 5 years ago

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Laurence Pierce

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Same here , I have a new 2014 Mac Pro 12 Core, 1000GB SSD, Dual AMD 700's 32GB Ram, Lightroom is terrible, filmstrip view I click an image and I can sometimes get a spinning beach ball, radial filter is almost un-usable, Crop is awful .

I see very little diffrence on the 12 core than with my old 3.1 2008 8 core

Lightroom is far too slow on professional Apple Mac Desktops , I am thinking of gaining over to photomechanic, Photoshop CS6, and CC 2014 are fast

I would have expected that LR5.6 be a real Pro APP that is built for multicore and GPU, VERY DISAPPOINTED , I think I will also test Capture One Pro

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Kelvin Young

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I recently switched from Aperture 3 to Lightroom 6 and am finding it slow on my Late 2012 27" iMac with 3.4GHz i7, 3TB Fusion Drive, 12GB RAM and GeForce GTX 680MX 2048MB. Performance is slower than I would like. I don't mind upgrading to a Mac Pro, but it doesn't appear like LR6 can take advantage of dual GPU for processing. That would mean that one of the two GPUs would be sitting idle. Please correct me if I am wrong. Anyone running LR6 on a Mac Pro? When can we see LR take advantage of multi-cores and multi-GPUs?
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Chris Cox

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This is a great conversation that's not related to the one you posted on, so I created a new conversation to continue the discussion.

Please reference the new conversation here: Lightroom 6 is running slow on my iMac
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Gretchen Baria

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I just upgraded to a late 2014 iMac with 3.5 GHz Intel Core i5, 16GB RAM, and 3TB Fusion Drive and noticed Lightroom 5 and Lightroom 6 run significantly slower than on my Macbook Pro with 2.6GHz Intel Core i7, 8GB RAM, 256GB SSD and 750GB HD. Wondering if it's because of the difference in processor, difference in SSD, or if it's an issue with Lightroom. :-/
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Gretchen Baria

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I set Lightroom to open in low resolution and it seems to have fixed the issue.