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Participant
November 7, 2021
Question

Lightroom Classic v11 Mac Slow and CPU extensive

  • November 7, 2021
  • 3 replies
  • 557 views

Lightroom Classic v11 Mac Slow and CPU extensive, anyone have any recommendations on how to improve performance?

This topic has been closed for replies.

3 replies

Participant
November 10, 2021

Me too, something is very very wrong with Lightroom Classic v11.0 on my system (iMac Retina 5K, 27-inch, 2019, 3.6 GHz 8-Core Intel Core i9, 64 GB RAM on macOS Monterey 12.0.1).

It takes about 40 seconds from launch until I see the first photo rendered in the Library module. Other things are super slow too, but that's where it starts.

dj_paige
Legend
November 11, 2021

Try the suggestions I mentioned above.

Conrad_C
Community Expert
Community Expert
November 7, 2021

What kind of Mac do you have, with how much memory? And is it a new Mac, or have you had it for a while?

ExSierraAuthor
Participant
November 8, 2021

iMac 2017 5k retina 27", quad core i7 @ 4.2ghz, 16gb DDR4 ram, with SSD drive.  Mostly happens when in the develope module, but really mosy of the time.  I did not even know my Mac had a cooling fan until after the v11 release, now it is blowing hard when running lightroom classic.

dj_paige
Legend
November 8, 2021
quote

iMac 2017 5k retina 27", quad core i7 @ 4.2ghz, 16gb DDR4 ram, with SSD drive.  Mostly happens when in the develope module, but really mosy of the time.  I did not even know my Mac had a cooling fan until after the v11 release, now it is blowing hard when running lightroom classic.


By @ExSierra

 

These are symptoms that the CPU is working very hard (causing fans to run) and can't keep up (lag). Potentially due to the 5K screen. First, please turn on the GPU acceleration (Preferences->Performance->Use Graphics Processor should be set to AUTO).

 

If that doesn't help, please try an experiment where you set the monitor resolution to 1920x1080 and use Lightroom Classic for a while (let's say 15 minutes). Does the problem get better/go away?

dj_paige
Legend
November 7, 2021

Performance doing what?