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Q: Zoom (Accessibility feature) is extremely slow with multiple monitors [OSX 10.10]

When connecting an external display to my Laptop and using the "Ctrl + Scroll" functionality for accessibility zooming, the display/graphics are extremely slow.

An estimate of FPS would be sub 1FPS. The machine becomes unresponsive and is unusable for a minute or so, until I can get it zoomed back out, and it begins responding normally.

 

This is very disruptive, as its a feature I use often.

The same laptop on OSX 10.9 did not exhibit this issue.

 

Hardware: MacBook Pro 13" Retina Mid 2014, 16GB Ram

Software: OSX Yosemite 10.10

System Information: http://cl.ly/image/0H1p032w0M0w

 

Reproduction steps:

 

1. Enable CTRL+SCROLL zoom functionality in System Preferences > Accessibility

2. Connect external monitor (Display port cable)

3. Hold CTRL and Scroll to zoom

4. System becomes slow, graphics slow, showing < 1 FPS without any other applications running

MacBook Pro with Retina display, OS X Yosemite (10.10)

Posted on Oct 23, 2014 6:33 PM

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Q: Zoom (Accessibility feature) is extremely slow with multiple monitors [OSX 10.10]

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  • by blagus,

    blagus blagus Dec 5, 2014 10:12 AM in response to Predominant
    Level 1 (0 points)
    Dec 5, 2014 10:12 AM in response to Predominant

    Same issue. And always there is someone saying to reboot, reset SMS, clear PRAM, use last updates.

    Using a MBP 13" Retina with Yosemite with two external displays pushing 1080p. In Mavericks everythings was just fine.

     

    What worked for me was ...

    Activating and deactivating "Smooth images" (that was crazzy). What is more crazzy is that zoom with smooth works much better, but I do not want that feature (I am a user interface developer, I need zoom to see how pages are rendered, pixel-by-pixel)

     

    And the best temporary kludge was...

    Setup "Zoom Style" to "Picture-in-picture" and then in "More Options…", "Adjust Size and Location" set the best lens size . I resized it to th size of my entire screen, but it is a bit slow; better setup half of the screen size.

     

    I hope it helps, and I hope dunnb Apple developers pay more attention to details next time. I swear the zoom was the best feature of MacOSX for me.

  • by Count Jakku,

    Count Jakku Count Jakku Dec 5, 2014 5:08 PM in response to Predominant
    Level 1 (0 points)
    Dec 5, 2014 5:08 PM in response to Predominant

    Hey - I have a work around. Set the zoom to picture in picture. You can make  the picture area full screen if you want. This significantly increases the zoom speed.

  • by Baytelman,

    Baytelman Baytelman Dec 6, 2014 1:36 PM in response to Predominant
    Level 1 (0 points)
    Dec 6, 2014 1:36 PM in response to Predominant

    Apparently, 10.10.2 fixes it !

    I'm using the 10.10.2 developers pre-release and it feels good with Retina + 1080 TV.

    Monday I'll test with 3 monitors (retina + 27" Apple Display + 1080 LCD) and let you know.

  • by stevefram,

    stevefram stevefram Dec 6, 2014 1:53 PM in response to Predominant
    Level 1 (0 points)
    Dec 6, 2014 1:53 PM in response to Predominant

    Yup.  Same problem here.  Slow on the MBP15" monitor, and intolerable when an external monitor is plugged in.  Yosemite was a serious downgrade.

  • by t87,

    t87 t87 Dec 6, 2014 2:12 PM in response to Baytelman
    Level 1 (9 points)
    Dec 6, 2014 2:12 PM in response to Baytelman

    Thanks for reporting, you got my hopes up! Could you please do me a favor and check if this issue has been fixed too: Menu bar icons flash when changing Desktops (namely the icons in the menu bar keeps flashing when ever you switch focus between a Desktop and a Full screen app or between two Desktops, very clearly visible in Dark Mode). Both of these bugs are related to discrete graphics card usage.


    Thanks!

  • by andrew54941,

    andrew54941 andrew54941 Dec 6, 2014 7:02 PM in response to Baytelman
    Level 1 (4 points)
    iCloud
    Dec 6, 2014 7:02 PM in response to Baytelman

    Hopefully it fixes it but its still occurring for me on 10.10.1 iMac (27-inch, Late 2012)

  • by Baytelman,

    Baytelman Baytelman Dec 8, 2014 8:50 AM in response to Predominant
    Level 1 (0 points)
    Dec 8, 2014 8:50 AM in response to Predominant

    Confirmed: 10.10.2 SOLVES THE PROBLEM.

     

    I'm using 3 monitors

    - MBP Retina

    - Thunderbolt Display 2560x1440

    - 1920x1080

  • by t87,

    t87 t87 Dec 8, 2014 8:53 AM in response to Baytelman
    Level 1 (9 points)
    Dec 8, 2014 8:53 AM in response to Baytelman

    Could you please check if this issue has been fixed too: Menu bar icons flash when changing Desktops

     

    In 10.10 and 10.10.1 the icons in the menu bar keeps flashing with white boxes when ever you switch focus between a Desktop and a Full screen app or between two Desktops, very clearly visible in Dark Mode. Does it happen in 10.10.2?

     

    I ask because Apple told me they are directly correlated. Thanks!

  • by Ryan Newton,

    Ryan Newton Ryan Newton Jan 23, 2015 12:48 AM in response to Predominant
    Level 1 (0 points)
    Jan 23, 2015 12:48 AM in response to Predominant

    Ugh, it's hard to even test this because sometimes it becomes so unresponsive that I just have to reboot the machine.

     

    In my case, I've got a newest generation retina MBP and the problem happens regardless of whether there is a monitor attached.

     

    I thought it might have something to do with the fact that I'm running f.lux to change the screen colors at night.  But disabling it doesn't seem to make a difference.

     

    Also, all graphics and window management functions on my system become laggy (though not as bad) after/during running google hangouts.

  • by Eric Merrill,

    Eric Merrill Eric Merrill Jan 28, 2015 6:24 AM in response to Predominant
    Level 2 (225 points)
    Jan 28, 2015 6:24 AM in response to Predominant

    You will all be happy to know that this is fixed in 10.10.2. YAY!

  • by andrew54941,

    andrew54941 andrew54941 Jan 28, 2015 10:04 AM in response to Eric Merrill
    Level 1 (4 points)
    iCloud
    Jan 28, 2015 10:04 AM in response to Eric Merrill

    THE SMOOTHNESS IS REAL

     

    YOSEMITE 10.10.2

  • by Chuck Straughn,

    Chuck Straughn Chuck Straughn Jan 28, 2015 11:44 AM in response to Predominant
    Level 1 (0 points)
    Jan 28, 2015 11:44 AM in response to Predominant

    Confirmed, 10.10.2 fixes this. Just as good as before! Multiple monitors and all. My only complaint, and I hope Apple hears this minor complaint, is we have been suffering for this from the beginning without any acknowledgment and then they didn't even disclose in the 10.10.2 list of fixes that this item was fixed. I don't understand why but regardless I am DEEPLY grateful to Apple that it is fixed. Thank you.

  • by akilbasa,

    akilbasa akilbasa Apr 1, 2015 11:50 AM in response to Chuck Straughn
    Level 1 (0 points)
    Apr 1, 2015 11:50 AM in response to Chuck Straughn

    It did NOT fix the issue for me.

     

    • Yosemite 10.10.2,
    • MBP 13 Retina
    • 1 external Thunderbolt Display (+own retina)

     

    Extremely slow zoom on the retina screen. And when i shift over to the external 1080p, it's a little smoother but STILL LAGGY.

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