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damiano.f
damiano.f
Known Participant
May 24, 2022
Question

Mac Studio M1 Max Slow on Photoshop

  • May 24, 2022
  • 1 reply
  • 8484 views

I have just switched to Mac Studio (m1 Max 64GB Ram).

 

Performances on graphics are super! comparing to a MBP i9 6-cores 2019 with 32Gb Ram, the Studio is around 5 times faster on GPU based tasks, like some filters such as iris blur, path blur etc...

 

The disappointment comes to me when on CPU based tasks, such as Median Blur for example the two machines have the exact same perfomrances. Also, when using the option "select subject" the Mac Studio can;t really cope with it, sometimes it selects random things in the corner of the images, but no the subject at all! If you then manage to get the subject selected and you go in "refine edge mode" or "selection mode" (whatever it's called) it's very laggy and not precise on the edges. When you then have refined the edges and press "enter" to obtain the selection, the colourd (apple) wheel shows up for a 2-3 second before bringin you back to the main photoshop workspace.

 

Is this something i'm just experiencing myelf or are you guys noticing the same weird behaviours in some tasks?

 

please let me know.

 

Tahnks,

 

D 

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    1 reply

    D Fosse
    Community Expert
    D FosseCommunity Expert
    Community Expert
    May 24, 2022

    Both Select & Mask and Blur Gallery use the GPU, so it's not as simple as GPU vs. CPU.

     

    However, according to the documentation, both run under OpenCL, which may not be very well supported in MacOS these days. They will probably be rewritten for Metal, if they haven't already.

    damiano.f
    damiano.fAuthor
    Known Participant
    May 24, 2022

    Hi,

    Thank you very much for your reply, that's helpful to know!

    However, how do we explain that those functions run very smooth on previous Mac OS machines? (Intel based ones).

     

    Thanks 

    damiano.f
    damiano.fAuthor
    Known Participant
    May 26, 2022

    Sorry, I don't have a fix for you - the point was that all the GPU code is in transition (both on Mac and Windows), and things change constantly. It started with Apple dropping OpenGL and OpenCL support, followed by Microsoft, thus forcing Adobe to rewrite the whole GPU code for Metal and DirectX. That's what they're doing now.

     

    The workarounds for now, which may or may not help in this case, is to go into PS preferences and check "disable native canvas" (which reverts to older code), and/or disable "multithreaded compositing". I don't know if it will do anything here. Personally I don't have any problems.


    Hi D,

     

    thansk for your help. I tried both of the options you have listed here, but unfortunately none of them made the process better.

    Hope they fix it at some point as it's very useful to have select subject working smoothly for quick selections.

     

    Thanks so much for your help

     

    D

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