Assuming that CC 2015.4 worked fine, then there likely is a system issue on your Mac or a bad installation of Lightroom. It is very unlikely this is a bug and that any fix from Adobe will cure your flicker/delay.
1. Make sure your Mac OS is up-to-date. If you have a video card that allows for card manufacturer updates, check for those as well.
2. Restart your Mac
3. Uninstall Lightroom and then reinstall from a fresh download. (Note: your catalog and work will stay intact)
I have the same problem 2011 iMac, with the previous version no problem at all
BTW: I just disconnect the graphic card acceleration and works better (but slower)
Thank you. I have updated iOS software and reinstalled LR and there is no change I am afraid. It is just with this version of LR. My iMac is mid-2010.
Thank you. I am afraid my skills do not go as far as changing the graphic card settings.
Do you know how find if my video card needs updates?
I have the same problem, just after upgrade.
Mac Book Pro Late 2011
Every change I do in develop module introduce some kind of flashes.
For example: if I adjust exposure, the image start blinking.....'till a stop the Exposure slider
I don't think is a Video Card problem, since the only changes was in Lightroom.....not HW....and it worked fine since the last upgrade.
I tried to disable "Use Graphics Processors" in Lightroom Preferences (Performance section)....and it works a bit better...but that's not a solution for me, since I have always used this features.
I think there's some bug.
Yes, I have noticed the same things.....but it slow down performances....and it's not good....since it worked till yesterday.
I think is a bug and hope that Adobe Staff will read this thread
In the meanwhile I have also tried to uninstall Lightroom, clear all Preferences and Adobe folders; than I have reinstalled ex-novo everything.....but the problem is here again
I am having the same problem worked great until they update now it flickers when using the adjustment sliders and using the crop tool to rotate the image. I hope there is a fix coming because this really slows down my work flow.