Twitch flickering while watching full screen using Safari 11.0.1

It's a bug related to the Night Shift mode.

If you disable Night Shift it won't flicker.

If you enable Night Shift, videos played from Safari using full screen will flicker.

Yeah I have had this Twitch flicker issue as well on my 2015 MacBook Pro 13", I update regularly (safari 11.0.2, High Sierra 10.13.2) so that's not the problem.

For me the best solution was the official twitch desktop app. Only thing is, if I want to open a different app to watch twitch, might as well just open Chrome, I just don't want to 😁.

For live twitch, the app is just fine.

Hi, I have been having the same issue recently on my late 2015 MacBook Pro 13" running the latest update. I found a work around so you can watch Twitch in fullscreen without the flicker. If you just run Twitch in Theatre Mode instead and hide the chat using the arrow on screen you get essentially fullscreen mode. This didn't flicker for me while standard fullscreen still does. Tried other things including the solution in this thread about Adobe but nothing works. So give this a try.

Theatre Mode with Chat Hidden.

Have you tried what I've said on Jan 26th?

It's the Night Shift option of the macOS system.

It has nothing to do with the Safari browser (not an extension nor plug-in, nor Flash).

Go to System Preferences > Displays > Night Shift, and turn it off.

I have a similar flicker issue with Safari when I watch educational videos full screen on Lynda.com. The vids are viewable but randomly there is some flicker/noise, which gets irritating after a while. This happens only in full screen.

Have switched to using Chrome to watch Lynda.com vids full screen, but would prefer Apple to sort out the Safari bugs. Also scrolling web pages with parallax image effects is jittery in Safari, while Chrome renders fine.

(Safari 11.1 - MacOS High Sierra - Macbook A1707)

Have you checked the App Store for a Safari update? 11.0.2 has been released.

Right here is the solution. Updating the OS worked for me.

Disable adblock, worked for me

Thanks, this helped. Just downloaded High Sierra and it seems to have fixed the issue I was having on Twitch with the flickering. Hopefully this solves the op's issue.

Enable Adobe Flash Player and test.

Safari > Preferences > Websites > Plug-ins > Adobe Flash Player

https://support.apple.com/guide/safari/customize-browsing-settings-per-website-i brw7f78f7fe/mac

I finally found a way to solve the problem... I went back to macOS Sierra, which is the version my Mac came with. So it really seems to be a bug that comes with High Sierra...

Same issue and same solution (been watching in theatre mode) on my 2015 Macbook, although I get the flickering then lots of thin purple bars and the screen freezes. Only happens on Twitch. Interestingly I can watch it fine in fullscreen when connected to a monitor.

I'm having a very similar problem watching Videos on YouTube and Netflix... I'm on the latest version of High Sierra on a 2015 MB Pro 15".

Also, in addition to that flickering there is a weird colorful line on the bottom border of the video. This happens not only in Safari, but also every other browser I've tried. I found out that this problem has something to do with the scaling of the monitor. When I use the standard scaling (which I normally don't do) the problem doesn't appear. But when I use a higher scaling I have said problem.

I've contacted Apple and they also ran me through a couple of things but nothing helped. I even tried to completely reinstall macOS but this didn't help either. Apple said there might be a problem with my graphics card, but I really don't think so, because the diagnosis doesn't say so and I never had any other graphic related issue except for when I'm streaming videos on YouTube or Netflix using any other monitor scaling than the standard one.

Have any of you guys found a solution to that problem by now? I really don't like using the standard scaling because it's to big for my taste, and the higher one always worked until a couple months ago...

Thanks in advance.