revDAVE
Level 2 (270 points)
iPhone

Q: Screen sharing w/ Yosemite not working

Hi all,

 

I am trying to do Screen sharing from Yosemite MBP to Yosemite MBP and it will not let us. We are both logged in and texting etc. but even when we ask the person to share their screen and they say allow - nothing happens....

 

It used to work...

Teamviewer works fine...

 

Q: Any way to get this working?

 

Is it a bug?

MacBook Pro, OS X Yosemite (10.10.4)

Posted on Aug 7, 2015 2:35 PM

by Ralph Johns (UK),Solvedanswer
Ralph Johns (UK) Ralph Johns (UK)
Level 9 (73,217 points)
Applications
A:

Hi,

 

Messages and iChat before it uses a process called SIP (Session Initiation Protocol) to connect two or more people for A/V and Screen Sharing when using AIM, Jabber or Bonjour accounts.

 

VoIP systems also uses this as does Skype.

 

Somewhere along the line a server has to connect the two.

This is very much like an old fashioned Telephone exchange with people.

It is a text based protocol so it includes instructions and steps such as Ringing, Trying, Inviting and so on.

More https://en.wikipedia.org/wiki/Session_Initiation_Protocol

 

Technically there are internationally agreed ports that are supposed to be used.

On the Internet Back bone and to a certain extent ISPs are supposed ( I stressed supposed) to not interfere with SIP traffic.

However back during iChat 3 which Added Jabber Buddies to the iChat set up a lot of ISPs world wide started to close the SIP ports and demand extra money to open them up again.

The regular posters at that time used to suggested that people contacted their ISP for Breach of Contract which solved things for some people.

 

At iChat 4 Apple moved the SIP function (Skype never seemed to use the ports from the beginning).

 

The server that does all this stuff for Apple is their SNATMAP server (Originally snapmap.mac.com)

It is only used by Apple for the A/V chats which includes the Audio Chat alongside Screen Shairng connections in the accounts that iChat can do Video chats for (AIM, Jabber and Bonjour).

These continue into Messages  but does not included the iMessages variation added in Yosemite.

 

Once the SNATMAP server has connected the people involved then it drops out of the process.

As you start up iChat or Messages it is also used to test the Bandwidth speed you have (that is not mitigated by either Older OS and Quicktime settings or the Bandwidth Limit in the app).

 

This form of chatting is AIM to AIM or Jabber to Jabber or Bonjour to Bonjour.

You cannot connect across services (not even to the iMessages one in Yosemite).

 

However as all IDs nowadays tends to be based on email IDs anyone can be added to a Buddy List. (or in the case of iMessages anything can be an Apple ID).

With the advent of Yosemite's Screen Sharing from within the iMessages account it could mean a lot of unconnectable attempts are being made causing a drain on the server.

 

The Hosts are now aware (and have posted they have read it and done something with it).

Now it is a waiting game.

It will either turn out to be SNATMAP and Apple will do something about (albeit silently) or it will turn out to be something different in which case Apple wil probably lean on the people concerned and we still will not know anything until it all starts working again.

 

 

 

 

 

 

3Sigcopy2.png

8:12 p.m.      Thursday; August 13, 2015

 

​  iMac 2.5Ghz i5 2011 (Mavericks 10.9)
 G4/1GhzDual MDD (Leopard 10.5.8)
 MacBookPro 2Gb (Snow Leopard 10.6.8)
 Mac OS X (10.6.8),
 Couple of iPhones and an iPad

Posted on Aug 13, 2015 12:12 PM

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revDAVE

Q: Screen sharing w/ Yosemite not working

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  • by Ralph Johns (UK),

    Ralph Johns (UK) Ralph Johns (UK) Oct 4, 2015 2:06 PM in response to Jack Rosenzweig
    Level 9 (73,217 points)
    Applications
    Oct 4, 2015 2:06 PM in response to Jack Rosenzweig

    Hi,

     

    I had not checked the Contextual Menu and you are right it appears there.

     

    One method of connection in the the post was to highlight the Buddy then use the Buddies menu rather than the Contextual one or the icons at the bottom of the Buddy List.

     

    Somebody somewhere has not been keeping all their eyes on all the balls.

     

     

     

     

    3Sigcopy2.png

    10:06 p.m.      Sunday; October 4, 2015

     

    ​  iMac 2.5Ghz i5 2011 (Mavericks 10.9)
     G4/1GhzDual MDD (Leopard 10.5.8)
     MacBookPro 2Gb (Snow Leopard 10.6.8)
     Mac OS X (10.6.8),
     Couple of iPhones and an iPad

  • by Jack Rosenzweig,

    Jack Rosenzweig Jack Rosenzweig Oct 4, 2015 2:08 PM in response to Ralph Johns (UK)
    Level 1 (5 points)
    Oct 4, 2015 2:08 PM in response to Ralph Johns (UK)

    Hi Ralph.

     

    I see it in the Buddies menu as well on my machine:

     

    Screen Shot 2015-10-04 at 5.07.13 PM.png

     

    Cheers,

    Jack

  • by Jack Rosenzweig,

    Jack Rosenzweig Jack Rosenzweig Oct 4, 2015 2:26 PM in response to Jack Rosenzweig
    Level 1 (5 points)
    Oct 4, 2015 2:26 PM in response to Jack Rosenzweig

    Actually, I was just able to connect to my mother's computer and take over her screen. It did it via the ScreenSharing.app which launched once she granted access. So maybe we are on the other side. Also of note, she is still on 10.10.x while I was on 10.11.

     

    Jack

  • by Ralph Johns (UK),

    Ralph Johns (UK) Ralph Johns (UK) Oct 5, 2015 11:31 AM in response to Jack Rosenzweig
    Level 9 (73,217 points)
    Applications
    Oct 5, 2015 11:31 AM in response to Jack Rosenzweig

    Hi,

     

    Yes both Yosemite and El Capitan in the Messages App can invoke the Screen Sharing app to iMessages contacts.

     

     

    3Sigcopy2.png

    7:31 p.m.      Monday; October 5, 2015

     

    ​  iMac 2.5Ghz i5 2011 (Mavericks 10.9)
     G4/1GhzDual MDD (Leopard 10.5.8)
     MacBookPro 2Gb (Snow Leopard 10.6.8)
     Mac OS X (10.6.8),
     Couple of iPhones and an iPad

  • by bigdaddy999,

    bigdaddy999 bigdaddy999 Oct 15, 2015 5:33 AM in response to Ralph Johns (UK)
    Level 1 (0 points)
    Oct 15, 2015 5:33 AM in response to Ralph Johns (UK)

    Is there another means of taking control of someone's screen other than using the now-unworkable AIM screen-sharing connection?  I do remote support for octogenarians and the fact that the AIM sharing connection has been broken is a real problem.  All I see on Apple's info is screen sharing within a LAN, which is not very helpful in my situation.

     

    This is very frustrating!

     

    Thanks,

  • by Ralph Johns (UK),

    Ralph Johns (UK) Ralph Johns (UK) Oct 15, 2015 11:58 AM in response to bigdaddy999
    Level 9 (73,217 points)
    Applications
    Oct 15, 2015 11:58 AM in response to bigdaddy999

    Hi,

     

    The Screen Sharing App (the bit that Shares Screens on Bonjour computers) can be invoked form Yosemite's version of Messages (and above)

    It does require that the other end also has Yosemite or above.

     

    Then you needs to enable the Screen Sharing App by going to System Preferences > Sharing > Screen Sharing and setting it to Anyone.

    I am sure the same setting has to be on fro  the Bonjour option listed above).

     

    Then in Messages you have to start an iMessage conversation and then use the Details item top right (which offers three icons)

    Two invoke FaceTime the third  of Interlocking rectangles starts up the screen sharing app and uses the connection info from Messages to connect (much like the AIM/Jabber ways does).

     

    There is another way.

    It needs a more manual approach.

     

    In an AIM Screen Share and the Screen Sharing app method from iMessages uses a VNC connection to transmit the "pic".

    IN the Finder go to the Go Menu and select Go to Server.

    Enter VNC:// and then an IP on your LAN to test (As in vnc://192.168.0.255 for example)

    This will then try to connect to the computer at that IP and may ask you to enter a Password for an Account on that computer.

     

    Obviously your Router  and the people you help get Public IPs on their Modems or the Routers behind them.

    You would have to enter the Public IP.

    The bit that make the Router send the info to their computer is Port Forwarding.

    This means setting up port 5900 on their Router to point specifically to the IP of their computer on their LAN

     

    Obviously there are other apps that do the same things as Messages (should) and as simply.

     

     

     

    3Sigcopy2.png

    7:58 p.m.      Thursday; October 15, 2015

     

    ​  iMac 2.5Ghz i5 2011 (Mavericks 10.9)
     G4/1GhzDual MDD (Leopard 10.5.8)
     MacBookPro 2Gb (Snow Leopard 10.6.8)
     Mac OS X (10.6.8),
     Couple of iPhones and an iPad

  • by revDAVE,

    revDAVE revDAVE Dec 11, 2015 2:28 PM in response to Ralph Johns (UK)
    Level 2 (270 points)
    iPhone
    Dec 11, 2015 2:28 PM in response to Ralph Johns (UK)

    THANKS to all for all the help!

  • by Ralph Johns (UK),

    Ralph Johns (UK) Ralph Johns (UK) Dec 12, 2015 12:43 PM in response to revDAVE
    Level 9 (73,217 points)
    Applications
    Dec 12, 2015 12:43 PM in response to revDAVE

    4thanx.gif    for the    2correct.png  Points.

     

     

    3Sigcopy2.png

    8:43 pm      Saturday; December 12, 2015

     

    ​  iMac 2.5Ghz i5 2011 (Mavericks 10.9)
     G4/1GhzDual MDD (Leopard 10.5.8)
     MacBookPro 2Gb (Snow Leopard 10.6.8)
     Mac OS X (10.6.8),
     Couple of iPhones and an iPad
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