Screen Sharing issues

I've got VNC working fine for remote access. The problem is I've come across issues where I get disconnected, and the VNC server will never timeout the session. Since OSX seems to only allow 1 VNC connection to the computer, I'm unable to access it until I can get someone to disconnect the session or I have to remotely reboot the machine. I'm sure it's possible to set a timeout for the session, but I can't seem to find this anywhere. Any help would be appreciated.

The Original Poster and I have chatted and now got Screen Sharing between us to work.
In his Linksys WRT54G we set it to Allow Anonymous Pings.
It was already doing UPnP.
No other changes were made.
He has a Buddy who it is not working with he still has to check.
This Buddy has a another computer (Sister's) that does work so the issue may be a Filter in the settings or the device at that end is doing Port Forwarding or DMZ to the sister's computer.
9:30 PM Friday; February 15, 2008

Similar Messages

Screen Sharing issues MacBook Pro Retina

Loving my brand spanking new MacBook Pro Retina 15" running Mavericks. Display set to 1900x1200. The only thing it doesn't do, is play full screen YouTube video from my Mac Mini (2011), as soon as I put that in full screen mode on the Mini. Mouse and keyboard no longer respond, the only option is to wait untill it is finished or use the controls on the Mini. My screen sharing is set to all adaptive settings.
What I have done to do checks:
remote control MacBook Pro Retina from Mini (same settings for screen sharing, resolution on Mini is 1080p) and play full screen HD YouTube video: no issues, scaling works flawlessly;
check all network settings on both computer - no issues, both connecting full speed (400mpbs), wireless file exchange proves this;
reinstalled Mavericks both on the macbook and Mini;
removed all plists and preferences on both machines;
saved files to external HD, emptied harddrives, and clean installed Mavericks on both(!) computers
Installed all updates to december 12th 2013 (including the december screen sharing update).
All to no avail. So I figured to draw some new variables in the equasion and do some control testing.
I have done a test from an older MacBook Pro 17" (2010), display set to 1900x1200 as well. No problem at all controlling either computer. Scaling works flawlessly. Dito from an older iMac 21" running Mountain Lion. Like a charm, correctly scaling to meet the screen and network confitions.
So I figured shrinking the size of the application window on the MacBook to about 1/4 of the surface, and guess what: there she flies. Enlarging the application window on the MacBook Pro has a linear effect on the responsiveness of the screen sharing application, trying to view full screen video the Mini.
Verified this by controlling the older MacBook Pro 17" (1920x1200) from the MacBook Pro Retina 15". Confirmed that the above problems persist. Shrinking the screen again smoothens things out.
This quite definite to me, it is the screen sharing application that is not able to handle scaling on the hardware or interact with the software drivers of the Intel Iris Pro/NVidia GeForce GT750M combo. I hope this gets fixed soon!!

Setting Low Res on the apps didn't seem to help, however (as has been mentioned elsewhere) changing the display settings to non-HDPI does fix it, for GoToMeeting at least. (Also it let's you appreciate how nice the retina display is, in case you've already gotten used to it!)
You need an app for that however. SetResX from http://www.sendspace.com/file/mef6sk works well for me. To return to nice Retina/HDPI mode you have to go back to Display Preferences (and the "Show in Menu Bar" option for Display Preferences is sadly AWOL in Retina/Lion so you have to navigate through System Preferences.)

Screen Sharing issues with ML and SL with dual displays??

Don't know if this is a ML issue or was present in Lion (which I never upgraded to)
Setup...
Old setup was 2010ish MBP and only 2006 iMac. Both with SL 10.6.8 and both have two monitors...no issues.
Upgraded to ML on the MBP on release. Realtively painless process. I tried screen sharing today and I get odd responses with the MBP to the iMac. Just so everyone knows, screen 1 is the main iMac screen and screen 2 is the additional monitor. When showing both screens I could see all screen realestate. However, when I changed to only display screen 1 I started having issues. I couldn't get the entire screen to fit within the window nor scroll to show areas not displayed. Sometimes switching between fit in window and no fit, I would get a blank screen. Screen 2 only displayed and all is fine. I noticed on screen 1 that there was a little black bar or open space on the bottom of the window that was exactly the same size that was missing from the top. No ability to fit or scroll would allow the black space to move so that the menu bar on the top of the main monitor would display.
After doing a bit of searching with no luck and scratching my head, I took a look at the Arrangement screen in the display settings. Wouldn't you know it that the main screen (having a smaller resolution than screen 2) was aligned so that the top of each display was even with each other leaving a small space on the bottom of screen 1 compared to screen 2. When I moved screen 1 in the arrangement screen to a more drastic alignment to verify this was the problem...screen sharing crashed when going from both screens to only display screen 1. Tried screen sharing again going from two displays to one, crashed again.
It appears there is some sort of bug or maybe ML and SL screen sharing doesn't like each other when the remote computer has two monitors.
Submitting bug report to Apple but was curious if anyone else has seen this or knows a work around.
Mike

I have a similar configuration (Lion 2011 MBP and SL 2009 iMac w/ second display). After installing the recent Remote Desktop update things went awry when trying to share the iMac SL displays with the MPB Lion.
The displays on the iMac are the same resolution, however the second display physically sits a bit lower than the iMac display, so I had adjusted the arrangement to compensate the different heights. The second display is located physically to the left of the iMac display, but that shouldn't have any effect as far as I'm concerned. Screen sharing had worked in this config until the recent Remote Desktop update (on Lion).
I thought about what you mentioned about the display screen arrangement, so I decided to just test it for myself, arranging both displays side-by-side on the displays arrangement control panel. Surprisingly, it worked!
I do consider the Remote Desktop update to be the culprit and there must be some bug associated with that. I'm getting ready to submit a bug report, so hopefully we'll see a fix soon.

Lync 2010 Screen sharing issues.

hi all i am working on resolving a long standing problem that i have inherited form the previous admin.
our Lync2010 infrastructure for the most part works great the only issue being when external users trying to do screen sharing and file transfers.
after doing some testing with sharing and file transfers with at different locations this is what i have found.
Internal ---> Internal ---- Works
Internal ---> External ---- not work
Internal ---> External(On VPN) ---- work
External ---> Internal ---- not work
External ---> External ---- not work
i checked the infrastructure setup.
Public DNS A record AV.extdomain.com that points to an IP of our firewall
Firewall then NATS's the traffic on that IP to an IP allocated to the NIC on the edge server in the DMZ over ports 443 / 3478 / 50000 - 59999
AV.domain.com ---> xxx.xxx.183.117 ---> xxx.xxx.112.117 443/3478/50000-59900 (TCP + UDP)
oddly when monitoring this i cant see any traffic flowing on this rule (this could be the issue)
having reviewed some of my logs i found this entry with Snooper
ms-client-diagnostics: 23; reason="Call failed to establish due to a media connectivity failure when one endpoint is internal and the other is remote";CallerMediaDebug="application-sharing:ICEWarn=0x80020,LocalSite=10.26.160.198:4481,RemoteSite=192.168.254.147:1552,PortRange=1025:65000,LocalLocation=1,RemoteLocation=2,FederationType=0"
Content-Length: 0
i also cant telnet onto the public IP of av.extdomain.com xxx.xxx.183.117 over 443 or 3478 or any of the others ports.
am i right in thinking that AV ip address should be accepting connections over those ports and as it is not that's my problem?
i may have answered it my self just wanted a 2nd opinion.
Many thanks
Gordon

Some quick thoughts: Make sure those ports are bi-directional, meaning you have access both out and back in. Make sure the NAT for those IPs works in both directions, meaning that if you nat 183.117 incoming to 112.117, then 112.117 on the way back
out looks like 183.117. Make sure that 3478 is UDP, not TCP. Take those ports all the way up to 59,999.
All that said, you should be able to telnet to av.domain.com on 443 from the outside and get a connection. You won't get a result from a web browser as this isn't https, but a telnet should at least connect. You won't be able to telnet to 3478
because that's UDP, the other ports are dynamic so don't worry about them for now.
Check out James Cussen's tool here for port testing:
http://www.mylynclab.com/2014/02/lync-edge-testing-suite-part-1-lync.html
Please remember, if you see a post that helped you please click "Vote As Helpful" and if it answered your question please click "Mark As Answer".
SWC Unified Communications

Back To My Mac multiple display screen sharing issue

Since upgrading to Yosemite, I've been unable to access one of my screens remotely via Screen Sharing and BTMM. It only shows the screen attached to the HDMI interface, it's as if the other display doesn't exist. There is no option to select the other display in the Screen Sharing View menu. In Mavericks it would by default show both screens and I could select one. I've tried disabling and re-enabling the Sharing function on the host Mac. The screen that it does share works perfectly, so it seems to just be a problem of recognizing the other display.
Host is a 2012 Mac Mini, client machine a MBP, both running 10.10.1.

Spoke with Apple who spoke with Apple and so on. Tech support for Apple Desktop Remote acknowledges (as best they could) that there is a bug/ problem. Yes, reverting to an older (3.5 - 3.4 ARDagent) solves the problem (short term ?). They captured my OS info and will get back to me in 3-5 days - how do you like them apples! So, revert to ARDagent 3.4 and you can remote connect - may try this later... will post if it works. Here's what's been posted on this: https://discussions.apple.com/thread/3192451?start=0&tstart=0

Screen sharing issue

MacBook Pro 17" OSX10.7.3
All of a sudden I'm unable to connect via Screen Sharing from my MacBook Pro to my iMac via wifi network. It was working just a day ago. Don't know of anything I've done to disable it. I checked my iMac and in prefs have screen sharing enabled. I did a repair permissions and still no go.

The tech at Apple had me zap the p-ram...
On which machine?

Screen Sharing issue with VNC from Mac to PC - Black Screen

I have a Mac mini at my place of work. From it, using the built-in VNC capabilities in Leopard, I am able to successfully VNC to any Windows-based PC. I have a Mac Pro at home that tomorrow I am taking to my office. From my home I VPN into my office and want to VNC to my computers from the Mac Pro sitting at home. VPN connects just fine and when I attempt to VNC, I get a response from the computer at work and am prompted for the password and then I get connected. The problem is that the VNC screen is black. I can see that I am connected to the right computer because it's name is at the top, but there is basically no display. Tomorrow the Mac Pro will leave my home to be placed in my office. However, I am going to get an iMac for my home and need this functionality. I anticipate that I will have a similar problem with the iMac and would like to get it fixed now. Any thoughts on why I am seeing this? BTW...VNC works fine using Chicken of the VNC on my old iMac G3 running Panther over the VPN.
Thanx...Jon
Message was edited by: jhyiesla

I have the exact same problem! I can connect using RealVNC viewer, but, on Leopard's in-built Screen Sharing app, I can authenticate, and see the computer name on top, but, there is simply no display! I have opened all ports on my router, and completely doing away with the Leopard firewall also doesn't seem to help!
Any leads yet?

Screen sharing issues SL to 10.5.x

Hi,
Anyone know of a work round for getting SL to access a 10.5.x server?
I have a mac mini (G4) running as my mail/radius/sql server etc. Since I've upgraded my iMac to SL I can no longer access the server console via screen sharing, it ends up in a loop asking for user name and password. I can still use my macbook which is on 10.5.x, but I prefer the big screen of the iMac.
Server tools (10.6) will not let me access the certificates on the server, so this is getting painful, I've resorted to booting the macbook in target mode and running the iMac form that !!

My suggestion is to use TeamViewer.com or LogMeIn.com as both of them can navigate the internet and home routes easily. And for non-commercial use, they are free. In addition, they provide end-to-end encryption of your connection.
If you insist on using Mac OS X screen sharing, you will need to configure your Mom's home network.
1st you need to configure her home router so that it "Port Forwards" port 5900 from the internet to your Mom's Mac.
You already know you need to enable Mac OS X Tiger's Remote Management.
To make connecting to your Mom easier, you should then get a free dynamic DNS name from some place like No-IP.com or DynDNS.org. Then install a dynamic DNS updating client on your Mom's iMac so it keeps the dynamic DNS name updated as your Mom's ISP changes her DHCP assigned IP address.
Personally, unless you like that sort of thing, I would go with TeamViewer.com or LogMeIn.com.

Screen Sharing not working - Black Screen

Hi
I run a Mac Mini (2010) with Snow Leopard as a media server. The MM is headless so I rely on screen sharing to control it. I connect to it using Screen Sharing on my MacBookPro (also Snow Leopard) as well as LogMeIn when at work.
I have the MM scheduled to shutdown at night and come back on in the morning. Recently after starting up I get a black screen on Screen Sharing. I've tried a lot of the tips given and none have worked. Bizarrely the screen is black on LogMeIn as well so I don't believe it's a Screen Sharing issue.
If I force a shutdown (pressing power button) then restart, Screen Sharing works fine.
Any suggestions would be appreciated.
Regards
Aidan Cooper

Hi Guys,
Thanks for getting back to me.
Hironmay
I noticed the problem once I updated to Adobe Flash Player version 10.1.102.64 Universal Binary for Macs | 7.60
I am not sure what my development team in India has done and if they upgraded to the 1.3 SDK. I will check with them, and make sure that they do and see if that fixes the problem
I am not sure if I am getting a RTE, no messages or errors are popping up it is just staying a black screen.
I will pass along the suggestions you made to my development team in India, and hopefully it helps.
I will keep you updated.
Quick question, I was looking for the notification of the latest update on the collabritive methods blog and I did not see anything there.. is there another place I should be looking for the latest news about LCCS ?
As always thanks for the help.
Best,
Dan

IChat screen sharing - beat head against wall

Been going at this for hours to try and solve my attempt to have my dad share his screen with me. I'll try to list all relevant info for assistance. I have read many of Ralph Jones' posts, but I haven't resolved my situation. I am trying to use screen sharing with my Dad.
I recently moved 12 miles, keeping the same ISP Frontier with dsl and they gave me a different modem. Went from the Westell A90 - 750045 - 07 to the Netgear B90 - 7550044 - 07. Software interface is the same. The other change this week was I "upgraded" my Dad to an iMac G4 1.25 with 10.5, gaining screen sharing in iChat. He had a older iMac with 10.4 before the upgrade. I have a MacBookPro with 10.6.8. Also, part of the new move I started using the OBi110 voip device for Google Voice free phone calls. I worked on this problem with the device plugged in and removed from router. My screen sharing issue continued both ways. May be an issue, don't know. Port conflict? Issue continues when it's unplugged.
We can video chat and audio chat and text. After failing to screen share with the new Netgear, I switched back to the Westel. Screen sharing working for 1-2 seconds then stopped. I believe with both routers I got 'Screen sharing failed to start because" An unknown connection error occurred." '
After messing with port forwarding on the Westel with no success, out of frustration I switched back to the Netgear and here I am hoping to get this to work. It SEEMS that port forwarding is the issue talked about the most, so I'll explain the best I was able to do with this. Here is a screen shot of my port forwarding.
Also, connection doctor says this for both modems.
My dad's connection doctor does not have the Network status option (older version of iChat), so I can't isolate the problem to him or me, except that I believe it is with me.
I think I told you all the info and I have found is trying to solve this. I would GREATLY appreciate any help.

Hi,
1) My name is Ralph JOHNS
2) The first posts does not show me pics from some reason.
3) the second post pic has nothing to do with iChat or Messages Screen Sharing. It is about a stand alone app that can also be used.
4) forget Port Forwarding.
Screen Sharing in iChat or Messages is a Audio Only chats with a VNC connection alongside.
The VNC part is on a random port and therefore cannot be set up in Port Forwarding or Port Triggering.
You should use UPnP.
Most Netgears (when using their Own Software) tend to have a menu item for UPnP and it is also ON by Default.
However I think the Netgear you list is a branded software option for the ISP you have.
Undo any Port Forwarding settings.
Turn On any UPnP setting (Should be a simple Enabled/Disable check box).
If the Google Voice is a piece of Hardware make sure it is on it's own port.
A Company called Vonage do somethings similar but the instructions are to put it in line between the router and the computer.
This causes problems as it then tends to "suck" all SIP data and try and send it to the phone whereas iChat and Messages use the same SIP Protocol to initiate calls.
(SIP = Session Intiation Protocol)
9:32 PM Friday; June 21, 2013
 iMac 2.5Ghz 5i 2011 (Mountain Lion 10.8.4)
 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
"Limit the Logs to the Bits above Binary Images."  No, Seriously

Remote screen sharing

Screen Sharing Issue: Since upgrading both desktop iMac and laptop Air to Mountain Lion I have not been able to figure out how to control my imac from out of town. Had no problems before. I think I have all the "sharing connections correct. Help?

Screen Sharing Issue: Since upgrading both desktop iMac and laptop Air to Mountain Lion I have not been able to figure out how to control my imac from out of town. Had no problems before. I think I have all the "sharing connections correct. Help?

Having security issue with SL Screen Sharing

Hello,
Maybe I am missing some new setting in Snow Leopard that increases screen sharing security, but as it is, screen sharing is now insecure on my network.
Prior to Snow Leopard I would log into my Mac from another without selecting the "remember this password in my keychain"... after finishing the session, I would again be asked for my password before ropening a new screen sharing session. All machines on the network were Leopard.
Now, with all macs on the network Snow leopard, on one of the machines I can log on in the morning, work for a while, quit screen sharing, and go back in an hour and start sharing that mac's screen with no password required. Anoyone else can can do this also! I have checked the keychain on the Mac I am viewing from and there does not seem to be an entry there for screen sharing.
On another of the Snow machines it always asks for the password, but on 2 of them, once I have started viewing another Mac's screen a password is no longer required regardless of the fact that I haven't checked that "remember password" .
This means that after I leave a Mac from screen sharing it, someone else has full access to that machine just by clicking on the Share Screen button... unless I can close the hole somehow.
Any ideas or a way to fix this would be appreciated.
Thanks
Jamy

Hi all,
I just upgraded to Snow 10.6.2 so through 2 separate updates, this security hole on all 3 Macs on my network exists.
To test it I went to an office and opened a screen on another (Snow Leopard) Mac that was set up to allow users only to connect. I then quit Screen sharing, and returned 3 hours later, only to be able to open the Hard Disk window and return to that Mac's screen without any passwords required. I was very careful not to allow the Keychain to remember me.
Since I originally posted I see another thread has begun up expressing essentially the same issue.
I would strongly advise anyone who uses Snow Leopard in a secure environment , at least through 10.6.2, to disable screen sharing or risk unauthorized access, or monitoring, of their Macs from within their networks. Screen Sharing's security settings (if they work at all) do not work on Snow Leopard the same as they worked on Leopard.
I have not found a fix for this in the 3 weeks since I first noticed it other than to disable it, or restart the Mac I started the session from, then it will ask for a password, but that is hardly an acceptable fix in some secure or corporate environments (akin to having to restart in order to empty the browser cache when accessing webMail lol)
Regards,
Jamy

Issue with finder screen sharing.

My iOS development partner and I are currently having issues with screen sharing through the finder. Prior to installing OSX Mavericks there was no issue with adding each other as users to each others computer, but after the install is when the problem started happening. At the root level there are multiple users on each other's computers with our corresponding names but they don't appear in Users and Groups. So, having phantom users on each other's computers, we took them into the Genius Bar at our local apple store. They tried a few different methods, none of which worked, and had us reinstall the operating system and now we're back at square one having to resort to using the "permission" screen share as opposed to just being able to screen share directly though user accounts that we previously set in system preferences. I used the following console command, but it doesn't show the same accounts in the Users and Groups under System Preferences.: (dscl . list /Users | grep -v "^_") Any help or insight would be greatly appreciated.
Currently running Software OS X 10.9.1 (13B42) on both machines.

Found an answer at the following link.
https://discussions.apple.com/thread/5677786?start=0&tstart=0
Message was edited by: Shadowchief

LION screen sharing and remote log in issues

Hi,
In Snow Leopard I could access my iMac screen from my macbook and have the iMac restart and allow me to log in and continue to use the iMac.
In Lion I cannot access the log in screen remotely after a restart.
I need to go to the iMac and actually log into it with the keyboard before it will show up again on the network.
I tried to adjust the sharing preferences but nothing is allowing me to manage the iMac and restart it from a different machine.
Once I am logged in the screen sharing works fine. It's the log in issue that is not working for me.
thanks for any help in advance,
christos

i have not been able to get screen sharing to work at all, which has never been a problem for me. i'm registered as an authorized user on both computers, the passwords are correct, but it keeps telling me that the username/passwords don't work. and this is after the computers have already been "connected" using the exact same passwords and user name.

JavaFX Stage Paint issues when Mac Screen Sharing

When using Mac's screen sharing application you have to force a stage resize in order to see the Scene content. I don't have this issue when running native Mac apps while screen sharing, only JavaFX applications.

PS, also running Netbeans 7.1.2 gives the same results. I'll post a thread on the Open JDK forum for the mac as well.

Screen Sharing issues

Similar Messages

Maybe you are looking for