Why is Facetime Screen Sharing So Buggy?

I fix Macs for a living. Up until about 3 months ago, I did this on-site, at my client's homes or offices. I've had my Mac fixing company since 2003. I've never gotten into remote work though. Getting some form of screen sharing working on a random person's computer, especially when that person is generally totally clueless... that's a bigger project usually than whatever I'm there to fix.


However lately I've had no choice. So if you are doing Mac to Mac Facetime, Apple actually has a screen sharings option built in. So I can see, or control, someone's screen. Or I can invite them to see my screen. It's all built in and when it works, it works well.


It really is a game changer. It's fully built in to everyone's Macs already, and it works extremely well...


When it works. Which is about.... half the time?


Does anyone know why it is so sketchy? Facetime video and Facetime audio essentially ALWAYS work, 100% of the time. But Facetime screen sharing is totally hit or miss. Sometimes it completely does not work. Sometimes it works perfectly first try and feels like i'm screen sharing a Mac in the other room, not across the state.


I'm really bummed that, once all this corona crap started, Apple didn't prioritize Facetime. They could have fixed this screen sharing glitchyness, they could have released a few simple, built-in games that people could play together. Simple stuff like trivia or pictionary. And they could have built in some group video watching, so one person in a conversation could open a quicktime playable movie and stream that to everyone else. Anyone could pause it and it would pause for everyone. But all viewers would always be able to hear and speak to each other. They really could have made Facetime a one-stop-shop for stay-at-home collaboration.


But new features aside, I'd settle for existing features actually working reliably. I always tell my customers, we'll try to do Facetime Screen Sharing. "If it works, it works perfectly. But sometimes it doesn't work at all, because Apple" So frustrating.

Posted on May 31, 2020 2:03 AM

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May 31, 2020 1:40 PM in response to l008com

HI,


Check the Network Setting of both Mac and Router(s) involved.

Some of these may need to be opened/Allowed

https://support.apple.com/en-gb/HT202944

See the ones for Apple Remote Desktop as the engine for that is used to produce the Video feed.


I have my Router set up to use UPnP but I might not have the same concerns as your clients as to Network Access.


Ralph

May 31, 2020 7:13 PM in response to Ralph-Johns-UK

I can't check the network settings of both Macs and routers because I would need the screen sharing to be working to do that. And we're talking about situations where doing that kind of stuff is well beyond the abilities of the people I am helping.


But why I don't understand is why it can't work as seamlessly as regular facetime. That always works. You don't need to map ports for that, it works extremely reliably. But with screen sharing, its very buggy. I'd be content even with no-interaction screen sharing. Just let someone's screen be the source for video on a regular video facetime. Then I can see what they're doing and tell them where to click. Especially in 2020, reliable screen sharing over facetime would be amazingly useful.

Jun 1, 2020 1:25 PM in response to l008com

Humm,


I composed a very long piece with History about the ports iChat used when it could do 4 way Video Chat and Screen Sharing as well as Text Chats.


Face Time uses the same Ports


The Login to the server is the same as Messages


The Login Server Port is the same as a Jabber Server that uses SSL.

However Messages only acts like a Jabber server in this respect as the App has no Buddy List to display who is On Line.


This site does list the full set of ports for FaceTime.


I have not used Screen Sharing since iChat so at this point I become stuck in suggesting anything useful when Face to Face work is off the cards.


Ralph

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Why is Facetime Screen Sharing So Buggy?

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