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

Yes, I reported this yesterday too:

⚠ Mouse cursor lags heavily when Accessibility Zoomed: not related to Bluetooth, PRAM/NVRAM

https://discussions.apple.com/thread/6624221

have the same issue since upgrading to Yosemite, very annoying....

MacBook Air (13-inch, Mid 2013)

1.7 GHz Intel Core i7

8 GB 1600 MHz DDR3

Intel HD Graphics 5000 1536 MB

I also have the same exact problem. I have a i5 iMac Mid 2011 with an upgrade to 10.10 Yosemite connected to an external display. I like you never had this issue with Mavericks. Zoom is so painfully slow now that I had to disable it. My iMac has 12 GB of RAM and even with no apps opened, zoom is killer slow.. makes me want to punch a wall-kinda slow.

I think it's clear to say that something is up with 10.10.. some bug.

Apple please fix us zoomers 🙂

I'm having the same issue. Late 2013 Retina Macbook Pro

Send Apple feedback. They won't answer, but at least will know there is a problem. If enough people send feedback, it may get the problem solved sooner.

Feedback

I'm having the same ANNOYING issue! Apple really did a terrible job this time with Yosemite in terms of QA! 😐

Just to note, I have the same problem....

When you use Thunderbolt display with 15" MB Pro late 2013, it zooms unreasonably slow.

But when you close the laptop display and only have the Thunderbolt display on, it zooms a bit faster, but still too slow for such a new laptop.

I think it could be optimised a bit better, something somewhere can be improved here.

Regards,

Ned

The zoom is CRAZY slow. It makes my MBP retina (which is super fast) feel like a 386 machine. I deal with big spreadsheets and visual files so I use zoom all day every day. Please fix....pretty pretty please.

Is your MBP connected to an external display through Thunderbolt?

It seems this issue is related to the Thunderbolt connection somehow. When I unplug my external monitor the zooms goes back to normal response speed.

Here is a video of it in action...

https://www.youtube.com/watch?v=cIwNqc222RM&list=UU1T36p6_z09vmrFIKJY4MlA

Same issue here - but with older cinema display (mini display port)

Did you guys try to disconnect the external monitor and see if the zoom behaves normally again? It works fine if I disconnect the external monitors attached to my Thunderbolt port.

So there's some relation between both...

It seem to be also affecting the Mission Control response as well. Not as bad as the zoom but there is some degradation in performance.

Wonder how long Apple will take to address this.

Same issue here with an external monitor connected directly via HDMI on a MBP Retina Late 2013.

So it's not a Thunderbolt issue ...

Same issue here...Apple please fix this ASAP. This is unacceptable!