Mouse cursor lags with external monitor

have the same problem here.

OSX 10.9.4

Macbook Pro

Retina, 13-inch, Mid 2014

External monitors at the same time:

1. HDMI port to HDMI display

2. Thunderbolt port to thunderbolt-HDMI adapter to HDMI display

If only one display through HDMI port, everything works fine.

If only one display through thunderbolt-HDMI adapter, mouse lag.

Workaround for me, mouse lagging happens when I start my MBP every time,

after I change the Refresh Rate of the display connecting to thunderbolt (50Hertz to 60Hertz or 60Hertz to 50Hertz), the problem disappears.

(System Preference -> Display -> Refresh Rate)

I had the jumping cursor on my MacbookPro 8,2 with 10.9.5, so I upgraded to 10.10 public beta 3. It persisted. Long story short, for me it was f.lux, the app that tints the screen towards sunset to relax the eyes. Disabling it stops the jumping cursor! (Also, it only happened on my Dell U2412M at home, not on the Fujitsu P24W-6 I use at work.)

Does anyone else run f.lux?

Somebody suggested it might relate to newest Mavericks version, however I'm still on Mountain Lion (10.8.5) with a mid 2012 15' MBP and recently started having the same issue. I'm using my MBP in clamshell mode with a Samsung SM24A550 external monitor and never had had any issue until about a month ago. At first I thought it was my old Mighty Mouse failing, but I replaced it with a Genius Bluetooth mouse and have the same problem with the freezing monitor/mouse. Maybe it's some update regarding firmware, otherwise I can't devise why it suddenly stopped working properly.

I do have the same problem. Reported twice, no response from Apple. I really hope it will be fixed as I bought the 13 inches for that purpose.

I've noticed another way to stop the lag (until the next time the monitor sleeps) -- unplug the mini display port connector and plug it back.

Can't believe this has been an issue for years...

I "solved" the problem by reducing the transparency from the System's Preferences on Yosemite 10.10 latest beta. I do have a MacBook Pro Retina Mid 2014 and do not understand why this kind of things can still hapen, even on a "GM". Thanks to Apple to solve it ASAP 🙂

I have a Macbook Pro Retina 15" mid-2012, connected to an Apple Thunderbolt Display, and I'm having the same issue with my Magic Mouse on the Yosemite GM. Huge lag, and unfortunately, disabling transparency in the Accessibility settings didn't help.

Ive had this same problem for the last 3 years on 2 different macbook Pros (17" early 2011 & latest mid 2014 MBP fully spec'd out) - and an apple thunderbolt monitor. The weird thing is that it just comes and goes from day to day. I can't find a pattern. It really *****. I bought the new mbp to fix the problem, but it didn't.

I have a late 2012 27" iMac with an Asus PB278Q external monitor connected via mini display port to display port. I have the the same cursor lag/eratic cursor issue with a bonus of both displays sometimes just being black. The cool part is that when both displays are black the cursor is visible and doesn't lag. Awesome. I bought several cable thinking that was the problem. The apple display always come back if I just unplug the cable from the mini port, and sometimes comes back if I turn the Asus off, although it can take a few tries. This is my work machine so this is very annoying. I had high hopes that Yosemite would solve the problem but it has not.

I'd also like to mention that this is my 3rd iMac, the other two have been replaced under apple care for excessive image retention. This one has it too but there is no fix and I can't afford to be without the machine while they're (not) fixing. Apple is really on a roll.

I have same issue with mbp 15 mid 2012, os x 10.10 and lg 29um55 connected via miniDP - DP cable. Connect via hdmi don't help and in addition max resolution limited to 1920x1080 instead of 2560x1080.

Two years ago, on os x 10.8, when i connected another full hd monitor via hdmi, mouse lags similarly.

Same issue...never had this ever before...but a week after upgrading to 10.10 I now have this too..

Mid 2012 Macbook Air 11"

DELL monitor

Logitech USB mouse

nothing helps...will do a clean install of 10.10 next weekend...will report back...

Same issue for me:

MBPR 13 (Late 2012)

External Monitor: Dell 2713H

Mouse: Razer Death Adder with Synapse 2.0 installed.

Attached using Display port.

Same problem for me.

2014 Macbook Air I7, 8Gb RAM connected by Thunderbolt to 2014 iMac i5 using Logitech T631 bluetooth mouse

Same issue on a 2014 rMPB. I assume it's some conflict between HDMI monitors and the USB driver, in certain circumstances. The only way I know to alleviate it is to unplug and replug the mouse. Fortunately it only seems to happen once a day for me.

Same problem here but with a 27 Samsung monitor:

MacBook Air mid 2012

1.7 GHz i5

4 GB AM

intel HD graphics 4000

Samsung S27C350 Monitor

Apple really has to do something. Nearly 10 pages of complains should be enough...