Safari 14 Update Gives Screen and Projector Flickering

raina_b22 Said:

Q1. "Is your Mac completely up to date?"

A1. Updating might do the trick. I'm using Catalina 10.15.7 on both of these Macs. I'll update my Mac tonight to Big Sur, and will spread the word with a reply on how that works.

Q2. "Are you using an adapter to connect? If so, does it happen with a different adapter?"

A2. The adapter I use: USB-C Digital AV Multiport Adapter. I don't think I have a second adapter. I'll take a look for one. How I connect Is in this link: Connecting displays with Thunderbolt 3 (USB-C)

Q3. "If this continues, you may be able to reach out to Apple Support for further assistance. You may be able to reach them here: Get Support."

A3. If the above do not work, then I will contact Apple Support. And you bring up a good point, because my screen was just replaced. See my Post Here: Red Dot Atop Mac's Screen

Grant Bennet-Alder Said:

"Your Mac has ALWAYS blinked all connected displays when a new display is attached, as a signal to your, the user, that a new display has been recognized. Provided it only blinks once, this is a feature, not a defect."

-------

Got this Serviced:

It flickers, but I have to plug it in again to get it to work - elsewise, it just stays on the projector's input menu. - it never did that prior to getting this back from Apple, after it was serviced, recently. See my Post Here: Red Dot Atop Mac's Screen

raina_b22 Said:

Q1: "Thank you for using Apple Support Communities. From our understanding, when you connect your mobile projector to your MacBook Pro using an HDMI cable, it flickers, do we have that right?"

A1: Yes. That is correct. It now just goes to the menu of the projector, rather than to the output itself. It used to right go to the output. But, now I have unplug it, and plug it back in. Both times of purging it in, it flickers.

Q2: "Does this happen if you use another HDMI cable?"

A2: Yes. It happens with the come-with cable, and with a high-end one (Monster brand), one one in between (retailer's).

Q3:"You can also reset the NVRAM and the SMC to see if this continues."

A3: I've tried that an lots of other items. It just flickered - and I have to plug it in a second time to get it to show the output. My other Mac Does this as well My PC does not do this.

Update Fixed This:

I updated it, and not longer flickers, and takes me right to the desktop's screen - the output is how it should be.