Mouse cursor lags with external monitor

Hello to all my fellow frustrated users!

I think I can help us reach a solution.

Is it ridiculous that Apple doesn't seem to scan their own pages to resolve known bug issues? OF COURSE. Do they know this is a problem? OF COURSE. Here's how I see it: this problem is not really a problem because we are not the loudest voice in the room. Apple probably has some system of tallying complaints related to certain bugs. When the tally reaches a threshold, they decide to do something about it. So why not this bug? Well, they are probably devoting attention to the tens of thousands of teens out there crying about the latest changes to their iDevices on iOS8. Moral of the story: I don't think we are raising a big enough cry about this. I think the only way that we will get their attention is by submitting feedback. And I mean LOTS of it. I suggest we team up. More specifically, go here https://www.apple.com/feedback/ and make sure to reference THIS thread.

And tell them what you are telling us. I have started to do this every time I use my external display and encounter the problem. I plan on submitting feedback as often as I encounter the problem (almost daily). Hopefully, they will take notice. That seems like the right thing to do if you care about your customers. Thanks to all who have endured and continue to submit feedback despite the lack of changes.

Fuenticito, that is a great suggestion. I just submitted feedback and I will do so again every time I have the issue, which is several times a day. I created a text doc with the feedback link, and my feedback, which I'll keep open on my desktop to speed up the process. Note that you only get so many characters so be concise. Hopefully, If everyone does this Apple will not continue to ignore the issue.

I found a solution that fixed it for me. I added a USB extension cable (just one I found for cheap on amazon) between the mouse and the computer and I no longer get mouse lag. Worked for my wired mouse and for my wireless logitech.

Good luck!

I'm also having this problem with the U28D590 4k Samsung Monitor when using PIP/PBP. It's really annoying. I submitted feedback referencing this thread and I also reccomend everyone else does as well.

Toggling the display port version from 1.2 to 1.1 back to 1.2 only worked the first time I tried it. I turned the monitor off and on and now it doesn't seem to do anything.

This is not a mouse problem. It's a display problem.

This is one of those things that, like iTunes Home Sharing, will never be fixed (or, it seems, even acknowledged).

Actually, after more experimentation, it might be a monitor issue. I'm getting the same behavior in windows also. I'm not sure what is causing the problem. Maybe it's just HDMI lag? The first monitor is connected via DP.

I am having the same issue with my MacBook Pro (Retina, 13-inch, Late 2013) 2.6 GHz i5, 8GB Ram, Intel Iris 1536 MB graphics card, and a ViewSonic VG2236wm-LED external monitor connected through a DisplayPort > DVI adapter. I also just submitted this to the feedback link.

Same works for me - choose the monitor's menu, go up and down in the menu; exit the menu; all is wonderful. Go figure.

Björn - antar du bor i Sverige, eller?

Just bought a Macbook Pro 15' Intel Irish medio 2014 and connected 2* external 27' monitors. Both screens gives laggy cursor.

Same problem here with a MacBook Pro (Retina, 13-inch, Mid 2014), OS X Yosemite 10.10.1

At work I try to use a setup with a DELL U2412M and also tried with a Samsung Syncmaster 24" both connected via Thunderbolt -> MDP -> DVI

I reported the issue to Apple via their feedback form and linked to this thread. But I have little hope that this issue will be fixed once and for all in the near future.

I have Retina MacBook Pro 13' and LG-34UM95-P ultra-wide display with Thunderbolt connector. My Logitech Anywhere MX is terrible, laggy, can not be used when an external display is connected. I use the Magic Trackpad with no problem, no lag, but I can't use all day, because it's pain in my hand. Yes I have tried a Magic Mouse, but it's not ergonomic. I hope to improve the lag, but I doubt it. If I switch to Windows, if mouse lag doesn't change. This is so horrible. I'm not an happy Apple user... Do you have any tips that will help me? Thanks!

Ratina MacBook Pro 13' late 2013, OS X Yosemite 10.10.2

LG-34UM95-P, 3440x1440, Thunderbolt connector

A few things to clarify:

• Does the logitech lag on both OS X and Windows (run via Bootcamp or VM?) ?
• What happens if you switch off bluetooth?
• Is the macbook opened or closed when the lag occurs?
• Have you tried a cabled usb mouse?
• Do you mean by lag that the cursor is not moving more than a second or less?
• Can you test with the monitor connected via a MiniDP to DVI cable or anything like that?
• MagicMouse is working without problem?
• Do you have some sort of other bluetooth mouse at hand to try out?

Does the logitech lag on both OS X and Windows (run via Bootcamp or VM?) ?

- OS X only

What happens if you switch off bluetooth?

- Bluetooth can't be turned off, I have Apple BT keyboard.

Is the macbook opened or closed when the lag occurs?

- Closed. I tried to open. Same result.

Have you tried a cabled usb mouse?

- Yes, but i hate wired mouse, and it is also laggy.

Do you mean by lag that the cursor is not moving more than a second or less?

- Sometimes I miss the cursor, but it appears away. I can't write well, but it's unpredictable. I move the mouse steady rate, but falters cursor does not follow exactly.

Can you test with the monitor connected via a MiniDP to DVI cable or anything like that?

- Only Thunderbolt cable. No other for me.

MagicMouse is working without problem?

- Yes, but not ergonomic. I sold.

Do you have some sort of other bluetooth mouse at hand to try out?

- Yes, Logitech M555b. This is even worse. Useless.

I use these, because Logitech Control Center app is not available in Yosemite:

SmoothMouse, Scroll Reverser, BetterTouchTool, BetterSnapTool

I turned off everything, but doesn't help.

TigerCat-hu wrote:

What happens if you switch off bluetooth?

- Bluetooth can't be turned off, I have Apple BT keyboard.

Is the macbook opened or closed when the lag occurs?

- Closed. I tried to open. Same result.

Some things you can test:

• Try with the macbook opened with a fresh restart of OSX.
• Can you try with bluetooth off just for testing the mouse?
• Is just the mouse lagging or is the whole picture freezing? Try with a video playing so you can see if the whole screen is freezing.

TigerCat-hu wrote:

Have you tried a cabled usb mouse?

- Yes, but i hate wired mouse, and it is also laggy.

The exact same as with the wireless?

TigerCat-hu wrote:

MagicMouse is working without problem?

- Yes, but not ergonomic. I sold.

Same for me.. way to flat.. I am using a magic trackpad also.