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Issues with CS5 Liquify in my iMac with a AMD Radeon HD 6970M 2048 MB Graphics Card

Dec 30, 2011 3:32 PM

I have been trying to get to the bottom of this issue on my own, but to no avail.  I am running Photoshop CS5.1 Extended on an iMac with an i7, 16 GB of RAM and an AMD Radeon HD 6970M 2048 MB graphic card.  I am running OSX Lion.  Speed of the computer should NOT be an issue, but my liquify tool is impossibly slow.  I have seen others having this issue, but am not finding resolutions.  I have updated all of my software (Lion, CS5) and updated my drivers.  I have uninstalled Photoshop and reinstalled it, but still, no help.


My Liquify tool is so slow that it is impossible to use.  It does not register if I release the mouse either and I often have to click a few times to release the brush.  I have Photoshop 5.1 on a PC and the Liquify runs very smoothly.


Has this issue been addressed?  I am wondering if it has a root in how CS5 is reacting to the graphics card?  When I called Adobe, they swore it was Apple's fault.  When I talked to Apple, they were positive the blame lay with Adobe.  I just want a fix.  (Hey, I'll take a CS6 beta if that'll fix it.  )


Thank you,



  • Currently Being Moderated
    Dec 30, 2011 4:04 PM   in reply to rachelrenee77

    Do you have any third party plugins installed?  If so, have you tried disabling them?  (one was showng to cause a slowdown, but I don't have my office notes handy at the moment to remember which one)


    Also, there was one obscure third party utiliity program (haxie) that also caused slowdowns in Liquify. (and again, my notes are at the office, so I don't recall the name)


    And you can try the usual: trash/reset Photoshop's preferences.



    Oh, and Lion still has a bunch of video driver bugs that Apple is continuing to work on.


    Sorry I don't have more definite info right now.

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  • Currently Being Moderated
    Dec 30, 2011 4:30 PM   in reply to rachelrenee77

    Especially with Lion, it is possible that there are GPU specific driver bugs.

    I'll have to check with the Liquify engineer once we get back to the office.

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  • Currently Being Moderated
    Dec 30, 2011 7:40 PM   in reply to rachelrenee77

    Slow performance | Liquify | Photoshop CS5 | Mac OS:


    do you have any NTFS external drives mounted?

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  • Currently Being Moderated
    Jan 2, 2012 11:27 AM   in reply to rachelrenee77

    One other possibility - do you have any external drives or network volumes mounted?  (regardless of format)

    Try unmounting those volumes and see if it gets faster.

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