My MacBook Pro (2021, Tahoe 26.2) is having screen issues, but only when wifi is enabled. When wifi is on, it flickers, gets horizontal lines, occasionally blacks out. But as soon as I turn the wifi off, the screen is perfectly fine. This is not happening with bluetooth, or when I connect to the internet via a cable. What is going on, what can I do?
MacBook Pro 16″
"Works in Safe mode, fails in regular mode" implies "It's something you added".
each of the others you tried, like guest user, new user, reinforces that same idea.
Consider downloading and running this little "discovery" utility, Etrecheck. It changes NOTHING. Etrecheck was developed by a senior contributor here, and uses mostly system calls and simple tests to collect often-needed information.
it contains little tests for speeds of devices, CPU utilization, memory usage, energy usage and a digest of recent problems, in one easy to use package. it does not even need to be Installed. Because less can be learned when your Mac is running great, best time to run is when your problems are actually occurring, if possible.
if you follow the directions faithfully, its report (pre-laundered of all personally-identifiable information) can be "Shared" to the System ClipBoard, then Pasted into an ‘Additional Text’ window in a reply on the forums.
Use Etrecheck Pro for free:
The amount of data you get can be daunting. If you POST your report, some Readers here are willing to look over those reports, and can provide valuable insights.
Then start a reply on the forums, click the "additional text" icon, and PASTE
I have already deleted that. And restarted my computer. And emptied the trash. I see it's still showing up on EtreCheck, even though it's not in my folder anymore. (I attached a screenshot.) Any ideas?
Thank you. Booting in safe mode improved it greatly, though the flickering is not completely gone. Booting with a guest user eliminated the issue. Any thoughts?
Additionally, creating a new Admin account and running through that eliminated the issue. Ideas?
Here's my etrecheck report. Thank you for all your help! For reference, this issue happened for the first time on December 19. It went away, but then came back a few days ago worse than before.
Thanks. I just did a bunch of that already to make space for the new operating system. I'll do some more.
Would that make sense of it not flickering on the guest account or another admin account?
New EtreCheck report! I fixed my storage issue, and the flickering is happening LESS but it's not gone. Any other thoughts?
why do you have Realtek 1827 wireless network drivers installed?
your Mac has perfectly good built-in WiFi without those.
I have no explanation for that! I didn't install anything to my knowledge. I don't have a ton of tech knowledge and haven't messed around with it. Is there a way to uninstall them?
Do you have a docking station?
MacBook Pro screen problems with Wi-Fi
