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Chrisjhood
Known Participant
August 26, 2023
Question

choppy/laggy performance on a Mac with 2 screens

  • August 26, 2023
  • 1 reply
  • 1088 views

Lightroom classic 12.5

Mac OS 13.5.1

 

This has been an issue since the 2019 Mac Pro came out and I have tested now on a brand new Mac Studio M2 Ultra as well.

 

The issue is when youre in the develop module on your main screen and in the seconday screen youre in the Loupe Normal mode the sliders dont move fluidly like they do when ever else and the edit when applied to the image on both screens is super choppy and delayed.  I have called in many times about this issue and this last time the tech I was talking to could not replicate this issue on his PC with dual screens so it leads me to believe it is a mac only issue.  I thought for the longest time it was an issue with the 2019 Mac Pro only but after buying a new M2 Mac stuido and testing that I expented the issue to be gone but it wasnt.   

 

If you have grid selected on the seconday display while in develop on the main it works as it should and there is no issue. Its only when you have Loupe Normal mode on the seconday display. 

 

Please take a look at this and see if you can fix it. 

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    1 reply

    J
    Community Expert
    Jao vdLCommunity Expert
    Community Expert
    August 26, 2023

    This is fairly normal and happens on all platforms - not just Macs, It is happening because the secondary display is rendered from a preview image and not a live display like in Develop on the main display. The extra calculation of a preview makes it not as smooth. It is just fine (but noticeable less smooth) than with a single display on my M1 Max machine. It should still be usable quite well though but less smooth. To be honest I don't think the secondary display in Lightroom Classic is all that useful anyway and Adobe should really rethink how this is used.

    C
    ChrisjhoodAuthor
    Known Participant
    September 3, 2023

    I don't know what you're seeing, but on the three Macs I've tried, it's unusable in that mode specifically. When I use grid mode on the secondary display, it functions as it should and is fast and responsive, but as soon as I put it into any loupe mode, its performance goes to crap.  

     

    I completely disagree. I prefer to use two screens whenever I can.  The first screen I can keep in grid mode while I flip through and see a full-screen preview of the image on the second screen.  I can quickly flag images that I can then go back through to edit those.  When editing, I don't necessarily need the two screens, but I still prefer having both screens. I can obliviously switch to grid mode on the second so that my editing isn't affected but then if I want to go back to the grid mode on the main display it won't let me because I have grid selected on the second display.

      R
      Roving.Photographer
      Participant
      October 18, 2023

      Oh, sorry: should have mentioned it's a very well specced Mac Pro 2019 with discrete dual Radeons and SSDs + 128GB RAM. 

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