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

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.

Updated to developer 10.12.3 Beta 1 (16D12b) and the problem is still present. ARGHHHH!

Thinking of reverting to El Capitan, but reinstalling everything on my main production machine takes days...

Guys, has anyone found a solution to this yet? Are you all back to 10.11?

10.12.3 Beta 2 (16D17a) still not solving the issue.

Some have reverted to 10.11, I still put up with switching color profiles each time after sleep, you can access the settings quickly via spotlight.

If by 10.12.4 it's not fixed, I'll revert. For me reverting takes too long because of everything that would have to be reinstalled and reconfigured. Aside from this all good with Sierra. But *£$% is this annoying!

Same boat here - I'm not sure switching color profiles works for me - but in my case (late 13 MBP) the problem only shows when mirroring displays.

So I keep the lid open, have arranged the displays in such a way that I can't really "lose" my cursor to the other screen, and keep on using the external screen as the main display.

It puts up more heat on the MBP, as the video card has to drive both screens.

With all the information that have been posted on this thread and the other one, someone at Apple ought to have registered this issue at the very least 😟

Two weeks with El Capitan and everything works perfectly. No issues whatsoever.

Does your computer ever sleep? Or is it always on?

New 10.12.3 Beta (16D25a), issue still NOT SOLVED...

As expected:

Unfortunately no positive changes after updating mac OS Sierra to today's release 10.12.3 (German).

Just for the records… :-(

Regards, Lars

I had to go back to El Capitan just for this very reason; hopefully Sierra's future update fixes this.

which update: 10.12.3 final or 10.12.4 beta 1 ?

The problem still exists with the latest beta 10.12.4 (beta 1 (16E144f)), MacBook Pro 15" Late 2013, DELL UP2414Q.

I have this problem on the Dell UP3214Q with a late 2013 15" MBP... So it's fine with the newer version of this display...

Cool Thanks for sharing! Have to try it as soon as I get to my Screen!