YouTube not working after updating to Safari 27.0

Today I updated to Safari 27.0, and now YouTube won't work. The page loads, but when I click on a video either nothing happens, or it tries to play the video but never does. I've restarted and cleared cache, but still no luck. I'm using MacOS 15.8 on MacBook Air 2020 (Intel).


Any tips on how to fix this?


I've submitted feedback to Apple.

Posted on Sep 15, 2026 12:07 AM

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49 replies

Oct 30, 2026 2:12 AM in response to Pattlebay

So i found the problem in my case. With Gemini and the Terminal i found out that the youtube websites were blocked from old software i had installed like surfshark VPN, Foqos App. Something must have happend when uninstalling. So i installed them again and uninstalled immediately afterwards. 


Gemini Prompt: There is a deeper underlying error in the macOS network stack. Because standard websites load while specific connections like YouTube don't, we will bypass the browser to check the packet size (MTU) and extract the exact encryption error. Please open the Terminal app, enter the command: curl -v (https://www.youtube.com), and share the generated text—especially the lines starting with an asterisk—so we can precisely determine where the SSL handshake fails. 


I would recommend to describe your problem to Gemini with this prombt and see what's the outcome.


Hope it helped somebody.

Sep 22, 2026 8:22 AM in response to Tikka260

Tikka260 wrote:
I even took the machine to an Apple Store, they could not make any impression on the issue, except that they recommended that I either reset to Factory settings, which would only replicate the problem, or use Firefox until Apple issue a fix. Wonderful! In the meantime the laptop is a complete PITA.

Have you tried creating a new user account and seeing if it works there? I have no issues with YouTube in Safari in macOS 27. That would cause me to consider that it's not a systemic bug but rather some issue caused by your configuration.

Oct 9, 2026 5:59 PM in response to ioioioioi

I contacted Netflix live chat as the problem occurs on Netflix and Youtube only. (I have no problem on Prime)


They say this issue is related to Apple and that Apple needs to develop a new update to fix the problem. (Apparently, Safari 27 or Sequoia 15.7–15.8.2 didn’t work well on the 2020 MacBook.) I don’t know if this helps… (No, not really, because there’s nothing I can do but wait—I’m not even sure if Apple is aware of the issue.😮‍💨)


And I agree this is NOT professional.

Sep 16, 2026 3:58 PM in response to ioioioioi

After updating to MacOS 27, my Mac Mini M2 won't play YouTube or even Netflix properly. I am using 2 displays and the problem occurs to me when the main display is selected as my main audio output. However, when I choose the secondary display as my audio output, refresh the website, then it'll work properly. The reason why this won't work for me is because my secondary display is a tiny 7" monitor that I specifically use to keep my work chat open all the time. So you can just imagine the low audio quality.


And after researching, it looks like this issue has been reported even before the official global release of MacOS 27 so it's surprising to see that Apple ignored the bug reported and allowed the roll out.


Funny how we have to come up with workarounds instead of Apple "engineers" just doing their jobs properly and fix the simple bugs before the official roll out of what they proudly present as their best ever yet OS.

YouTube not working after updating to Safari 27.0

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