Screen Sharing Available - In Lab Use

I teach in a computer lab with 28 imacs. Recently my Remote Desktop (3.2.2) is showing the all imacs in the lab, but some of the imacs are showing Current Status: "Screen Sharing Available" and I can't control them. The other half or so show exactly what program the user is currently using. What setting has changed on their computer. How can I fix this?

I think I've got the answer. ARD-related ports must me open for BOTH client and admin computers. Although my remote client (which is in another city) is connected directly to a cable modem via ethernet (so there's no need to map any ports) my ADMIN computer was behind an Airport Extreme Base Station. I thought there was no need to do any port mapping on this router because I was not the client, but since full ARD control consists in information both coming from AND going to the admin, ports must be mapped in both points of the "net". So I enabled "Apple Remote Desktop" under "Advanced> Port Mapping" in Airport Utility and now I'm not having problems anymore. If your router is not Airport Extreme, then you should open ports 3283 and 5900 (both TCP and UDP) in all your routers. If it is a local network, then the ports must me mapped to the admin computer's IP address.

Similar Messages

  • Screen Sharing Available "Current Status"

    All of a sudden clients in my lab display "Screen Sharing Available", I try to control any aspect and get an error saying that the task is not supported on MacBook 6? How can I get back to control my macs?

    I followed article HT2577 on uninstalling Apple Remote Desktop 2 or 3.
    http://support.apple.com/kb/HT2577
    I disable Apple Remote Desktop client software:
    On the client computer, open System Preferences and click Remote Desktop. If necessary, click the lock button to authenticate as an administrator of that computer.
    Deselect "Make Apple Remote Desktop active on this computer."
    Deselect the checkbox of each account that was enabled for ARD. (Alternatively, you can open Terminal and use the kill command to stop the ARDHelper process, followed by the ARDAgent process.)
    To Remove Apple Remote Desktop, execute these commands in Terminal:
    $ sudo rm -rf /System/Library/CoreServices/Menu\ Extras/RemoteDesktop.menu
    $ sudo rm -rf /System/Library/CoreServices/RemoteManagement/
    $ sudo rm -rf /System/Library/PreferencePanes/ARDPref.prefPane
    $ sudo rm -rf /System/Library/StartupItems/RemoteDesktopAgent/
    $ sudo rm /Library/Preferences/com.apple.ARDAgent.plist
    $ sudo rm /Library/Preferences/com.apple.RemoteManagement.plist
    Then I reinstalled remote desktop 3.2.1
    Then updated to 3.2.2

  • ARD no longer shows "control computer", only "screen sharing avail"??

    I have been running ARD for well over a year on my iMac to manage several servers that are located far away from me.
    I normally use the "copy" feature to push new zip files of our Web site to the server when it is updated. When logging into ARD today, I noticed all the servers are no longer showing "Control". Instead they all have "Screen Sharing Available" listed in the current status column. When I go to copy my files from my local machine to the servers, I get an error: "This Task Will Fail - The remote desktop software is not active on www.servername.com".
    However if I select a server and then click the control button, I can still connect to the server fully and work with it?
    This has never happened before and I am at a loss as to the issue. I have had some changes to my local setup recently that may be the cause of the problem.
    1) Linksys router died, replaced it with a Apple Airport Extreme.
    2) Keychain got corrupted. Deleted the login.keychain file to rebuild a new one.
    I have restarted my iMac several times, and even restarted the servers to see if this would clear up the problem. No luck.
    If I try and drag-copy my zip files to the servers from my local machine after connecting via ARD, the window that asks if I want to send the file ignores my click on the "send" button and does nothing? Before this problem occurred I could easily drag-copy items.
    Does anyone know what could be causing this to occur or how I can reset/fix my ARD clients and servers?

    Okay I have figured out part of the problem and fixed it, although one issue still persists.
    I fixed the "Current Status" issue for my servers by adding port 5900 & 3283 to the port forwarding settings in my Airport Extreme via the Airport Utility application. I don't remember having port forwarding turned on for my (now dead) Linksys router, but I could be mistaken.
    Now I have a different problem. When I go to "copy" a file from my local machine to a remote server, I get a message that says "This task will fail: A console user is not logged in on www/servername/com"
    If I log into that computer first, I am able to copy items, but I remember being able to copy items to my remote servers before without having to first sign into them? Am I mistaken on this or have I uncovered another problem?
    Any help appreciated.

  • ARD 3.2.2 - Current Status - Screen Sharing Available

    Hello,
    like several other users i do have a problem with some of our mac client computers in ARD 3.2.2
    Usually those Macs do display a Current Status in ARD like:
    Idle (time)
    or
    Available
    which we would call an expected state.
    Unfortunally some macs tend to show another status:
    "Screen Sharing Available".
    This other status results in: a working screen sharing in ARD
    BUT other tasks like i.e. UNIX Commands send from ARD to this hosts just dont work as ARD end in the following error message:
    The Remote Desktop Client software is not active on HOSTNAME
    So as a quick test i ssh'ed into 2 macs, one of those was affected by the problem. Comparing the output of
    ls -la | grep Remote
    and the result is totally same.
    So both macs showed me:
    AppleVNServer
    ARDHelper
    ARDAgent
    Then i checked the firewalls on those macs and each firewall has the default ports 5900 & 3283.
    The only problem here is that i cant define UDP or TCP on 10.3.9 Macs.
    The macs do run Mac OS X versions from 10.3.9 up to 10.5.6
    Sometimes a simple reboot fixes the "Screen Sharing Available" issue.
    Right now i am wondering how to fix this issue as some threads do suggest re-checking firewall settings ( which i did ) others suggest using a local administrator insteed of the admins name in Sharing.
    Right now none of those hints worked for me and i am wondering if this is a known bug and if there is a known solution.
    any help is appreciated
    Best regards
    fidel

    I have been experiencing the same problem now for months -- various Macs on my network that I control/administer with ARD 3.2.2 intermittently displaying a status of "Screen Sharing Available".
    After reading through this thread, I started poking around in System Preferences on my client Mac (from which I control/administer the others), and I appear to have fixed my problem! I have no idea if this will help anyone else, but here's what I did:
    In the "Security" preference pane of "System Preferences", I clicked on the "Firewall" tab. The ensuing window contains a list of applications, each followed by a pop-up menu containing two options: "Block incoming connections" and "Allow incoming connections"
    Sure enough, "ARDAgent" was in the list of apps and sure enough, it's setting was "Block incoming connections". I changed this setting to "Allow incoming connections", switched back Apple Remote Desktop, and hit Command-Y to refresh the listing of ARD computers on my network (I did not even quit and re-launch ARD). The list was immediately updated, and ALL of ones that had been showing "Screen Sharing Available" in the "Current Status" column switched to "Available" or "Idle (time)" and their icons switched from pale blue to the normal, darker blue.
    Problem solved (at least for now)! Will report back any changes/updates.
    Additional information, for those that are interested:
    I have 12 Macs on my office LAN that I control remotely from the iMac on my desk (same office, same subnet). All are running ARD 3.2.2.
    The iMac on my desk is currently running Mac OS X 10.5.6. It is a first-get Intel iMac.
    The 12 Macs on the network are running various versions of OS X from 10.3.9 to 10.5.6. All but one are older PPC Macs; one is a newer, aluminum Intel iMac. As of this morning, all three that are running Leopard were working correctly with ARD, while the results were mixed with the others running both Tiger and Panther. From this, I can only conclude the OS version on the various server Macs makes no difference with regard to this problem, although it MAY be that those running Leopard are immune. I cannot be sure of that, however.
    Hope this helps. Good luck.
    Message was edited by: Richard Neil for clarification

  • Help can't copy files just says screen sharing available?????

    I can do everything else but for some reason can't copy files. i've noticed that suddenly all computers have screen sharing available. i know its not the clients as it works fine on another mac. but on this one it just fails all the time. i've checked the version and they are both the same 3.2.2 but i am flumuxed. i reinstalled last week and thought it had resolved but then suddenly today it happened again. does anybody know why this is happening?

    Roboloko
    +Is this the recommended procedure from apple?+
    Not really. It's simply common troubleshooting techniques that have been used time and time again by many who've experienced problems generally. Some are recommended by Apple. Search as many of the boards as you can and you'll find these tips/recommendations mentioned countless times as well as many others. Sometimes its not something directly related to ARD that is causing ARD to have a problem.
    +did you after some test get to the conclusion that this will solve the problem?+
    No testing as such. Sometimes it solves the problems other times it does not. It's offered as something for you try before you contemplate something more drastic such as reinstalling a clean OS followed by a reinstall of ARD. Or ultimately a reformat and reinstall.
    I can see from your later post that it's not worked for you. I'm not surprised. Sometimes there are deeper underlying problems that only a reinstall or reformat and reinstall will 'cure' or possibly a solution offered by another poster? What was offered here was only meant as a possibility that might assist. As a computer user - regardless of platform - you should know this?
    Tony

  • Screen Sharing and WindowServer processes using 35-45% of CPU!!

    I have recently relocated and reconfigured my Apple network and computers in the house :1) MacBook Air dual display MBA with 20" cinema screen in the office, and 2) and Mac Mini connected to a large LCD TV in the living room.
    The plan now is to use the MBA as a primary computer and connect via wireless screen sharing to the MM so that I can monitor that system, run more intensive apps, watch EyeTV, file server tasks, etc.
    But now this has increased CPU and fan activity on the MBA beyond what I would expect. The activity monitor indicates that the Screen Sharing and WindowServer processes are using combined between 35-45% of the CPU (screen share process is a constant 25%!!).
    This is not good, and I wonder if it will be fixed in a future release. Any ideas or suggestions on how to limit the impact of screen sharing on CPU?

    It seems to be running better with system update, and use of a faster computer (now using the higher end mac book air)

  • Screen Sharing Warning when in use

    Hi,
    Main question: "So what I would like is if anyone knows a way to just having a warning dialog when someone is connecting to screen sharing."
    So here is my issue.
    I have a MBP and I share an iMac with my GF. We both have administrator accounts.
    So the other day we got home and I went on my MBP and wanted to clean up some files on the iMac. So I just screen shared into the computer but I didn't know that my GF was on the computer.
    So she is upset that I have this ability to view the screen without her really knowing (I know there is a small icon).
    But I also love remotely using my computers.
    So what I would like is if anyone knows a way to just having a warning dialog when someone is connecting to screen sharing.

    There is a way...
    You can send a full screen message to the computer being controlled, but this will allow you to block your GF screen.
    This is called Curtain Mode
    http://www.apple.com/remotedesktop/remoteassistance.html
    Cheers!
    Message was edited by: FOX-HOUND Zero

  • Screen Sharing Connection failed when using dock shortcut

    I have 10.10.2 installed on this computer - just updated - and 10.10.1 installed on a couple others (in the process of upgrading) as well as older versions installed on some older computers.
    I have Screen Sharing in the Dock and when I right click on it I get a list of recently connected computers. Until recently this generally worked for making the connection to that remote computer. Sometimes there were minor issues such as systems showing up which are no longer on my network - or showing up with an obsolete name. The big issue is that lately systems are showing up with a .vncloc extension and even when they don't it is hit or miss as to wether or not using the shortcut will make the connection.
    I get an error message that says: Connection failed to "ComputerName".
    Please make sure that Screen Sharing (in the Sharing section of System Preferences) is enabled on the computer to which you are attempting to connect. Also make sure your network connection is working properly.
    In every case - after I see that message if I open a Finder folder - and navigate to the other system and click on Screen Sharing in the Finder window it will connect - and I can do this repeatedly. Every so often the shortcut will work but mostly it does not.
    I have looked for ways to clear that recent items list without success.
    I have cleared the keychain access to the remote computers and reset without success.
    I don't recall seeing this behavior prior to the first 10.10.x system being on my network.
    I have not (yet) tried - turning off screen sharing on ALL systems throughout the network then turing them all back on.
    Not sure if this is a I am using a single iTunes/iCloud account for many of the systems - but also have one permanent and several guest machines that have their own iCloud account.

    Hi Matt Wolanski,
    Thanks for using Apple Support Communities. Based on what you stated, it sounds like you are having intermittant trouble with screen sharing. It looks like you have already done some troubleshooting. I would recommend that you read this article, there are several things you can check that may be able to help the issue.
    OS X Yosemite: If you can’t share computer screens
    Cheers,
    Mario

  • I am looking for a Meeting/ Screen Sharing Application on iPad2 using which I can provide presentation/ screen sharing to other iPad or Windows PC.

    I am looking for presentation/ screen sharing application for iPad 2. Similar to WEBEX or GoToMeeting using which I can give presentation using an iPad.    

    For sharing between iPads, this might be worth a look:
    http://www.ideaflight.com/
    Cisco has a WebX application for the iPad that says it allows scheduling, hosting, and attending meetings. There is a client for GoToMeeting for iPad, but I believe that you can only attend, not host.
    Regards.

  • ARD screen sharing not working in Snow Leopard Lab

    I have a lab of 24 “education” imacs in commercial art lab and another 12 -27” imacs in a video production lab on a LAN
    They are running OSX 10.6.8 and Adobe apps such as Illustrator, InDesign and Premiere
    I had been using Remote Desktop 3.5 screen sharing to demo software to students at their workstations.
    I updated to Lion over the summer and found it to be a total train wreck in my lab so I reverted the lab back to Snow Leopard.
    However I no longer have the dmg file to reinstall ARD 3.5.
    The only thing on the App store is 3.6 which does not work for screen sharing to the lab machines.
    I can observe them, shut them down, I can control one at a time, I can even share my screen to ONE workstation at a time.
    So right now I have NO WAY to demo software to my students through screen sharing AT ALL!
    I put Lion on just the Admin computer and downloaded 3.6 and I can observe the lab machines, I can shut them down, but I can’t share a screen!
    I’m told by Apple that there is NO WAY to get a copy of screen sharing software that will actually work in my lab.
    I'm thinking all I would require is a copy of the ARD 3.5.1 dmg file but I can't find a place to download it.
    Any advice would be greatly appreciated.

    what a pain, buying old software to fix the new software.  Here is what I'm working on to work around it for now.
    So far in small scale its worked perfectly.
    Here is what I'm trying to setup (hopefully it doesn't confuse the teacher or student too much):
    1. Install Vine Server 4.01 on the teacher's computer.
    2. Setup Vine Server to allow multiple connections, and disable Keyboard, Mouse, and Clipboard input from incoming connections.
    3. Turn on the Vine Server.
    4. Create a desktop shortcut to use Apples VNC Client with the IP address of the Teacher's computer.
    5. When student's click on this they will connect to the teacher's screen but not be able to control, only observe.
    6. Teacher can disable the Student's access simply by turning the Vine Server back off.
    So far in small scale with 5 computers its worked well (Better than ARD at least!).  Not sure how its going to do with a class of 27 computers.  We DO have gigabit ethernet.

  • Screen sharing and vnc not working

    OSX Lion Screen Sharing
    I was using screen sharing on OSX Leopard using VNC Viewer.  Even after upgrading to OSX Lion this worked ok.  But then the other day there was an update to screen sharing which I applied.  This first, switced screen sharing off, so I have switched it back on.
    However now my VNC client no longer works with Screen Sharing.  I get the new login screen but at that point all keyboard and mouse input is ignored and is therefore unusable.
    This was working ok before the screen sharing update.
    Anyone else had this issue?

    Thanks but that is talking about using VNC on a Mac rather than connecting to a Mac with a VNC, my VNC client is running on windows.  Also, since my original post, TightVNC has also experienced the same issues with OSX Lions Screen Sharing so its not just a RealVNC issue.
    I did manage to connect once, just after rebooting OSX and that session worked fine, subsequent sessions exhibited the same issue though.

  • Screen sharing and remote management no longer working after some uptime

    Server is withoiut monitor.
    Users need to login via screen sharing from time to time.
    "Enable screen sharing and remote management" is ticked in Server.app everything is working fine (for days, weeks).
    ARD reports "Screen Sharing Available", so remote management is not running how it should.
    Screen Sharing.app is "Connecting…" forever.
    Kickstarting ARD (http://support.apple.com/kb/HT2370) does not help.
    Restart fixes it.
    Is there a workaround (over ssh) or a fix?

    seduc wrote:
    Do you know if
    fdesetup authrestart
    works then too?
    Off-hand, no.   I don't.  See this posting, or as would be typical in any case, try it?

  • Screen Sharing Not Working

    I have screen sharing turned on and it works fine when I'm in the house in front of the computer on the same network, but when I'm at the office trying to share the screen it is not working. I'm I doing anything wrong?
    I have the Macbook Pro hooked up to my TV (main monitor). I have the computer screen on "never sleep" (computer screen is damaged from motorcycle accident-can't damage any more) and the keyboard lights turns off after 5 seconds of none use.

    I'm leaving my personal MacBook pro at the house and using my office MacBook Pro trying to share the screen. I'm using the assigned vnc://ipaddress to login. What I mean by not working is that I get a message stating that my computer cannot be found. I drive home from the office (I don't do anything to the house computer) and sit in my yard and screen sharing works.
    Most likely when you are in your yard, you are connecting to your home WiFi network and this by definition is the same as being in the living room.
    If I need to configure my home router to port forwarding I'm not sure I know what to do and how to do it.
    Depends on the make and model of router. A Google search for "Port Forward yourroutermake yourroutermodel" will most likely find instructions.
    I'm talking my Mom, who lives in Louisiana, into buying a Mac and I told her I could help in Arkansas by screen sharing. So, is Port Forwarding a default feature on most routers?
    Yes, most routers allow Port Forwarding, however, for your Mom there are other options.
    a) Get 2 Free AOL Instant Messaging (AIM) accounts. Give one to your Mom. Now use iChat and in Mac OS X 10.5 (Leopard) there is an iChat option where you can ask your Mother to share her screen or she can click a button to export her screen to you.
    b) If your mother is not going to be around when you work on her Mac, you could install an iChat add-on called Chax which has an option to always accept requests for screen sharing. Your Mother would have to be very careful about who she allows in your iChat "Buddy List". This is also an option for your work vs home situation.
    c) Skype has a Mac OS X beta version that includes Screen sharing. You could use this for your Mom. No home router issues.
    d) You can subscribe to Apple's MobileMe service and use the Back-to-My-Mac feature. You must make both your systems and your Mom's Mac part of your account. Is not suppose to have home router issues, but Back-to-My-Mac works best with Airport Extreme or Express routers.
    e) You can use LogMeIn.com for screen sharing. No home router issues. However, LogMeIn.com is not as fast. However, it is fairly reliable and easy to get setup.
    f) You can Port Forward the screen sharing ports in your and your Mom's home router.
    I would like to have control of the mac at home and my Mom's new mac. How screen sharing works when I am at the house is exactly what I need. I see the other MacBook Pro in a window on my MacBook Pro computer and I have full control of the Mac.
    You can get full control, you just need to deal with your home router.
    Also note: Depending on how your Work network is setup, you may nave to deal with corporate firewalls that may not be happy passing your screen sharing requests.
    So do you have a corporate firewall? Do you have to configure a Proxy server in System Preferences -> Network -> Advanced -> Proxy? If you do, then you may have additional hurdles connecting from work to home.
    However, going from your home to your Mom's Mac only needs to deal with Port Forwarding on your Mom's home router.

  • Messages Screen Sharing Ends with a "Hanging" Desktop Screen

    Since the OS X 10.8.1 update, Messages screen sharing – that used to work well in my environment – everytime ends up with a hanging desktop screen. That means: The screen of the desktop, where Messages screen sharing took place, freezes. I have to swipe to another desktop in order to successfully quit Messages via the dock context menu. After that, its desktop screen is responsive again.
    This happens independant of who ends the screen sharing session.
    It used to work seemlessly before OS X 10.8.1. So I think there is an issue with this update, Messages and the screens (desktops) management.
    Message was edited by: Kurt J. Meyer

    Hi,
    As Screen Sharing does tend to involve a change from the Shared Screen at one resolution changing to your screen at possibly another (which for some produces the White Screen In Sharing) I thought it might pay to look at the method when wanting to go back to your own screen during a Screen Sharing Chat
    I would still report it here
    http://www.apple.com/feedback/ichat.html
    Obviously you have to use some of the free text area to state your OS version and Messages version at it will not appears in any of the drop downs.
    7:55 PM      Wednesday; September 19, 2012
    Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
      iMac 2.5Ghz 5i 2011 (Mountain Lion 10.8.1)
     G4/1GhzDual MDD (Leopard 10.5.8)
     MacBookPro 2Gb (Snow Leopard 10.6.8)
     Mac OS X (10.6.8),
    "Limit the Logs to the Bits above Binary Images."  No, Seriously

  • Screen sharing greyed out

    My friend and I both have Messages beta and FaceTime on our Macs and we are unable to share screens. The screen sharing option is greyed out. What are we doing wrong?

    HI,
    Screen Sharing in System Preferences uses ths same "engine" but does not need to be turned On for iChat (Or Messages) Screen Sharing to work.
    Both parties have to be on the same network.
    This could be AIM as both AIM Names and Apple IDs ending in @mac.com and @me.com login into this service. (These types of APple IDs are also valid AIM Screen Names -see notes)
    NOTES
    Apple IDs issued from iCloud (@me.com) can only be used in iChat 6 or Messages Beta (In Lion basically)
    Also these Apple IDs must have passwords that will work with the AIM servers (No more than 16 characters)
    Edit
    Thanks for the Points
    7:14 PM      Wednesday; July 18, 2012
    Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
      iMac 2.5Ghz 5i 2011 (Lion 10.7.2)
     G4/1GhzDual MDD (Leopard 10.5.8)
     MacBookPro 2Gb (Snow Leopard 10.6.8)
     Mac OS X (10.6.8),
    "Limit the Logs to the Bits above Binary Images."  No, Seriously
    Message was edited by: Ralph Johns (UK)

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