Mouse problems with display port 1.2 in MST (4K display)

The only way to "resolve" it is to either close or open the lid of your MacBook Pro. This seems to restart the driver and fix the cursor. You can also run Windows and never see this problem.

After having seen the problem present itself when using the external display as the sole display, and with it being used in conjunction with the laptop's display, I had sort of given up on one or the other being a potential "fix". Today's discussion has lead me to think that vitaligent is onto something here. I started off the day using both displays today and had the normal headache with this bug (photo editing is dam near impossible on the RHS of the external display); simply closing the MBP remedied the issue, at least for the past few hours. If/when it returns I'm going to continue to try to reset the display server by opening/closing the laptop while leaving the external display running. After a day or two of use, I hope to have something definitive to report on this potential work-around.

Same problem for me, using MacBook Pro (Retina, 15-inch, mid 2014) running macOS Sierra 10.12 in clamshell mode in a vertical Henge Dock, making opening/closing the lid impossible (except different monitor, Dell UP2715K, 5K@60Hz, using 2 DP cables). I guess we can only hope Apple is going to fix it, as I tried many different things with no success.

I have the same issue with my MBP on an Asus PQ321 running on 4K-res via DP 1.2. I had no problem before upgrading to Sierra.

Well, I'm out. I thought this was the sort of thing that Mac users didn't experience. I spent $2600 on this 2013 rMBP 15 and was preparing to spend well over $3000 on the 2016 model. I'm really glad I didn't buy it. Goodbye Apple.

Hey I'm also looking at a $3000 MBP 15" 1TB purchase but want to know if the stuff I already have will work with it. I need MST working in macOS. I know it works in bootcamp Windows from my research, the hardware supports it.

I have three Dell U2414H LCDs (support DP1.2/MST hubs built-in). Does anyone know if I can daisychain over MST using a 2016 MBP? There's just too many dongles needed otherwise.

If so, I'll be buying my first Mac ever. I had a Commodore in the 80s!

Thanks.

I have the same problem with a Dell 5K 27" display, connected to my rMBP 2014. It happens when using both thunderbolt connectors at full 5K resolution.

I have had the same problem too, the cursor changing and getting misaligned on my 4K Asus display. It seems to have been fixed with today's Sierra 10.12.2 update. I have been running it for a couple of hours now and so far it works perfectly. Crossing my fingers....

I was hoping too much. After the monitor went to sleep and woke up again, the problem showed up again... 😠

10.12.2 is out and this is still not fixed... drives me crazy.

Some people found a link between Adobe CC being installed or updates, I have found no such link. It did this from the very start of a clean 10.12 Install. Mouse drivers (I use a Logitech) also have no influence on this, as have custom graphics drivers. I have a late 2013 MBP with Nvidia and it did this with and without Cuda installed.

This issue seems to affect all MacBook Pros with discrete graphics (AMD or Nvidia) running any kind of MST display (4K, 5K). It usually comes back after sleep, no matter what temporary "fix" you apply. It affects the RIGHT side of the MST display, that's why moving across the vertical middle the cursor changes. The Left side is always ok.

Sometimes, after waking from sleep the image comes up on the external display and then it shuts off for a second or two and then it comes back. Looks like macOS is resetting something. In this case all is good.

> Does anyone know a way to create an Automater App to switch the Color Profile?

Switching between My monitor's profile (Dell UP3214Q) and Adobe RGB "fixes" this until next wake from sleep.

Thanks!

It seems that the problem became more random after the update, but it still present more than not. And it happens on a 5K display as well (as my case). exactly as experienced by all of us. I tried the "color profile change" and "screen saver" approaches to solve it (at least temporarily) but it's completely random. Bottom line is: there is not clear workaround and no solution yet.

There is a solution. It's called El Capitan. I reverted to the old OS and everything is running smooth

I think I'm going to have to do this as well, virtually impossible to work at the moment. How easy is it to 'update' backwards!

You need a bootable USB with El Capitan (it's a bit tricky to find an installer, but not impossible). Then reboot your macbook while holding the Option key, thus having the possibility to choose the USB key as the startup disk. Wipe your hard drive clean and do a fresh install. Don't forget to copy all of your documents before that 🙂 I don't know if Time Machine can help you when downgrading.