Cannot authenticate screen sharing

I have an Alu iMac running 10.5.8, and an older Powerbook G4, also running 10.5.8. I've set up the account preferences so that anyone on my local LAN can share both disks and screens.
Taking control of the Powerbook's screen from the main iMac is no problem - I can see the PB, ask to share screen, am prompted for username and password, enter them, and I'm in.
But, I can't get the reverse to work. From the PB, I can see the main iMac, I select and ask to share the screen, but there's no prompt for a username, just a request to 'enter the password to share the screen of the main iMac'. Whatever I type, I'm told that 'the Authentication failed'. I can see shared disks and access them, it's just screen sharing that doesn't work.
Suggestions? I've set screen sharing up with minimal access controls at the moment - anyone should be able to connect.
Russell

I found a folder called OSXvnc in /Library/StartupItems.
Deleted it, restarted, and the problem went away. I never have installed Vine.

Similar Messages

Cannot get screen sharing to work long distance...

I set up an AIM account for my mother-in-law so that I could remote screen-share her MacBook and help her with learning how to use it and trouble shoot it (it's a Late 2008 Aluminum MacBook hand-me-down from my wife).
I've set up the account, but cannot get remote screen sharing working. Screen sharing works fine over bonjour, but no go over the internet using AIM. I can control my wife's MBA from my iMac and vice-versa, but neither of us can control her MacBook. When we choose "Ask to share users screen...", we get the pop up window stating "Waiting for response from user", along with the spinning gear icon. If she chooses "Share my screen with...", the pop up window appears on our Macs and we're able to choose accept. But then the pop up window switches to "User would like you to share his or her screen" and just sits there. Nothing happens. On her screen, she gets the message "waiting for response from user" and nothing else happens.
After a long wait, my screen will say, "There was a communication error during your chat. Messages didn't receive a response from..." and gives me the option to report the details to Apple.
What am I doing wrong?
Her MacBook is running Mavericks, as are our machines.
Message was edited by: pmpknetr21
Message was edited by: pmpknetr21

Hi,
@mac.com and @me.com ID works as AIM Screen Names (you add them like they are and existing name) but only if you are using Messages 7 or 8 plus later versions of iChat 6 in Lion.
You should be able to use the Apple Issued IDs in Mavericks.
If you using an AIM Registered name try using it without the @AIM.com or @AOL.com suffix (User Name only)
As AIM can "read" the Apple Database it will think the Apple IDs exist already but may not tell you that is the reason you can't re-register them.
Can you post the info being sent to Apple here ?
However stop the log after about 10 lines of the Binary Images (I will not need it all).
9:28 pm Sunday; August 3, 2014
 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

Lion and others Mac 10.6, I cannot see Screen Sharing on the network

Hello all,
Since I've install Lion on the Mac Mini I cannot acces (and see) on the network in Screen Sharing. I can access all other Mac on 10.5.8 and 10.6.x easily. In the prefs all is exactly like before I upgrade this OS...
Is someone can give me an issue.
Thank and have a great day!
Paul Dionne

I'm not sure what you are and are not seeing from which computers on the network.
Note that whatever your prefererences were before has no bearing on fixing your problem.
Which computers can you see, and from which computers.
What type of file sharing do you have enabled on the 10.5.8 and 10.6.x computers, AFP or SMB?

Cannot stop screen sharing

I was running ARD on my MBP and noticed my MacPro in the Scanner list. I thought it was odd since I did not have 'remote management' or 'screen sharing' services enabled. I entered my username and password, I got a message "The computer "MacPro" is running a VNC server that dose not support Remote Desktop keystroke encryption. I click continue I can view and control my MacPro.
The strange thing is at the top of my ARD window is an IP of 10.0.1.251. The IP of my Mac Pro is 10.0.1.4.
I confirmed that nothing in sharing was enabled, toggled them on and off. Did a port scan of 127.0.0.1, and 5900 is still open.
Something else very strange, on any mac running 10.5 Sidebar> Shared> All, is the IP 10.0.1.251. click on it and all I get is "share screen" and it goes to my MacPro with a similar warning "The computer "10.0.1.251" is running a VNC server that dose not support ScreenSharing keystroke encryption."
I do have ARD Admin and Chicken of the VNC installed, but I have the same configuration on my MBP and another MacPro.
I am able to block 5900 by setting the Firewall to "Allow only essential services" but I shouldn't have to do that.
And what in the world in broadcasting 10.0.1.251? I've changed my network configuration from manually to DHCP. Changed ethernet ports, gone WiFi. Not to mention 10.0.1.251 is in use on my network by one of the wireless cameras. If I type in the address in a web browser it goes to the camera (as it should).
I'm running OS10.5.5 and ARD admin 3.2.2 on my MacPro; OS 10.5.4 & ARD 3.2 on my MBP. I updated my MBP to see if the updating would duplicate the problem. Now that ARD admin won't work at all, so now I have to go fix that.
Any ideas?
Thanks.

I found a folder called OSXvnc in /Library/StartupItems.
Deleted it, restarted, and the problem went away. I never have installed Vine.

If Your Screen Sharing Stops Working, Read This

SCENARIO: I have a network of Macs. On my main machine (a Mac Pro), I have set up bookmarks in Safari that link to the Screen Sharing URLs for other Macs on my network (Mac minis, MacBook Air). For example:
vnc://192.168.1.51
vnc://192.168.1.52
So I can kick off a Screen Sharing session with one of those Macs simply by clicking the appropriate bookmark in Safari.
PROBLEM: Sometimes when I do this, one of two things happens... either the Screen Sharing program launches in the dock but the window for the other Mac does not appear at all, or the Screen Sharing program launches and a small black window (with nothing visible inside) appears. Killing and restarting Screen Sharing does not help, and restarting the remote Mac does not help.
SOLUTION: One way to solve this problem is to restart the Mac where you are attempting to use Screen Sharing. But this is overkill; it works because it incorporates the second, easier solution to the problem:
1. Launch the Activity Monitor program.
2. In the Process Name list, look for "NetAuthAgent". It may show as "Not Responding".
3. Select NetAuthAgent, and then click Quit Process (the red stop sign button at the top of the Activity Monitor window). Then, click Force Quit.
Your Screen Sharing should now work.
It appears that as part of connecting to the remote Mac, your Mac must authenticate itself... and NetAuthAgent is part of this process. If this program freezes, hangs, or locks for any reason, the authentication will not work, and you cannot use Screen Sharing. Killing NetAuthAgent is harmless, as far as I can tell, and it will automatically relaunch the next time it is needed.
For anyone else having problems with Screen Sharing not working correctly, I hope this information helps.

having related problem with NetAuthAgent
"loginwindow" process in activity monitor is Not Responding constantly (through warm and cold reboots)
this causes a number of problems, slow network performance, hangs, no ability to restart/shutdown
killing "NetAuthAgent" is the only way to make "loginwindow" process responsive again
and restores lost functionalities
having this problem across three networked machines (macpro, macbook pro, mac mini) all running 10.5.2
have reapplied the 10.5.2 combo upgrade but no fix. only witnessed this problem since 10.5.2

Screen sharing no longer works.

I cannot use screen sharing between my laptop and mini, although I used to be able to do so, after I "updated" to Lion. However, I can use file sharing, showing that wireless (airport) connection is working. This seems to be an Apple network problem. I tried the solutions posted (signing out of MobileMe, restarting my laptop), but Screen Sharing comes up, the "Connecting" window shows and then goes away, while the network/(my laptop name) window stays on. Laptop also shows up in the sidebar. Trying for Screen Sharing help gets me a message: "Topic currently unavailable." Is there a solution that does not involve connecting the two computers with an Ethernet cable?

Is Firewall turned off on both machines?

Really tired of screen sharing not working after upgrade to 10.10

I have tried everything I can think of but I simply cannot get screen sharing to work any longer when I am not within my home network.
I NEED this to work. Anyone else having huge problems getting screen sharing working when away from their home network?
Anything at all I can try at this point? Sometimes the share screen button doesnt even show, sometime it does and then says it cant
come up, sometimes my mac at home doesnt even show up in the Shared sidebar area.

I've had lots of issues with my Macs picking up new names eg. 'iMac (2)' instead of 'iMac' which led to sharing issues (screen sharing, AFP etc). I've set up new DHCP IP reservations on my router (Time Capsule) in the hope it will stop happening.

Screen Sharing not working continuously in Mountain Lion

For some reason, I cannot get Screen Sharing to work continuously. I could not get it to work at all (even though I veried the settings were correct), and after reading some posts here, I rebooted my MacBook Pro and voila! it worked - at least on my home network. However, once I get to work, I can no longer connect.
Any ideas?

And how are you trying to connect with your home Mac from work?
Are you using Apple's iCloud Back-to-My-Mac (BTMM) feature? It should handle getting through home routers?
Does you work have a Firewall and proxy servers in place? They are going to block any attempt at accessing the outside world except via corporate approved networking channels, which frequently do not include Screen Sharing. If this is the case, I might suggest TeamViewer.com as it has an option for setting a Proxy and if the company has not disabled accessing the TeamViewer.com URL, it might work.
If no corporate firewall and proxy server, and you are not using BTMM, then do you have a home router? Did you setup port forwarding for port 5900 from the internet to your home Mac? <http://portforwarding.com>
What address are you trying to connect with? I you have home router you need to use the IP address assigned by your ISP to your home router. If you do a Google search for "what is my ip address", Google will tell you your Public IP address. You need this for your home router.
BTMM and TeamViewer.com avoid the need to know your Public IP, and port forwarding. Corporate firewalls are a beast of their own, and have to be handled on a case by case basis. Some will let you get through, some will not.
If you find you are going to be using the Public IP address of your home router, then you want to get a free dynamic DNS name for you home Mac from No-IP.com or DynDNS.org and then run the dynamic DNS updating utility provided by the dynamic DNS service on your home Mac to keep the dynamic DNS name updated each time your IPS changes your public IP address.

Lion broke screen sharing, VNC?

Lion is installed fine and dandy on my iMac. However, I cannot use Screen Sharing from my laptop (not upgraded... Yet) nor can I use VNC from my PC or iPad to connect to the iMac. Everything gets a "could not connect" error with no useful information.
I have Remote Administration turned on with thiMac and could use VNC just before the Lion upgrade went in.
Any pointers/suggestions?

etresoft wrote:
VNC is not a standard protocol.
But what IS truth?
Not easy to define!
We both have truths!
Are yours the same as mine?
What exactly do you mean by "standard" as it pertains here?
Standards exist and apply to those who agree to adhere to them.
The group of people who use a protocol commonly referred to as VNC agree on certain functionality, and means of operation.
Apple used to operate in accordance with the expectations of this group.
They no longer do.
So, you could (and more or less did) state accurately that Screen sharing isn't VNC.
Or that screen shareing with VNC no longer works.
The point of the OP was that something changed such that Object X no longer does Task Y.
That is true.
Any way you slice it, it's a net feature loss.

Screen sharing in yosemite not working

I cannot use screen sharing in messages with Yosemite. The screen sharing icon is light blue.

Do you get an error?
I've never done it, so be sure to follow the guide below for double-checking nothing was missed in setting up the connection.
http://osxdaily.com/2014/11/25/screen-sharing-messages-mac-os-x/
If the way in Messages doesn't work, I can recommend Teamviewer as an alternative.

Screen Sharing controlled by 'remote management service'....What is that?

Under preferences, 'Sharing', I cannot activate screen sharing. Message says 'Screen sharing is currently being controlled by a remote management service'. What does this mean?? How can I correct????

It thinks that Remote Management is also checked on the list of Sharing services. Is it? If so, then screen sharing is running through the remote management service.
Ok, that sounded like a definition using the word to define it. Remote Management is a superset of screen sharing. Apple makes a product called Apple Remote Desktop that can be used for an administrator to manage lots of Macs. Remote Management is the service that talks to ARD. Screen sharing is part of remote management, but Apple also provides simple screen sharing for people that don't have/need ARD.
Message was edited by: Barney-15E

Lion Screen Sharing Asks?

I'm trying to share the screen of my Lion MacMini located in the other room. Both machines are Lion 10.7.1.
Regardless of which account I use to connect to the macMini, I'm presented with a dialog that says "Ask to share the display. 'mini User' is using the display". This is a hassle, because no one is sitting at that machine.
When I attempt to share the screen with other machines, I can start screen sharing without intervention on the far end.
What determines whether someone needs to be sitting at the machine to initiate Screen Sharing on it?

Scratch that: there is still something wrong. Now, when "Connected as" mini User, I still must obtain permission from someone sitting there to start screen sharing, even though now, no windows are open.
So, as an alternative, I click "Virtual Display" and... and I get logged into _another_ user's account, the one which the machine defaults to because that password is saved in the keychain.
Furthermore, when I click "Ask" and walk over to the remote machine, it says the _other_ user is requesting access, even though I am "Connected As" the correct user.
So to summarize: I cannot start screen sharing in the account that I need to share without intervention -- even with no applications open, and virtual sharing automatically logs into some _other_ user's account.
Next, I opened Keychain Access and removed all entries for the server I'm trying to contact. Then, I "Connect As" and enter the appropriate user name "mini user" and _no_ password, since that account does not have a password. The file sharing connection proceeds. I click "Share Screen" and attempt to use the same user name and _no_password, and the system refuses to accept it.
So, perhaps for Lion Screen Sharing to work without intervention, accounts _must_ have passwords?
No, that's not it either. I went and set a password for mini User, and can log out and log in successfully there. I can "Connect As" with the new password, successfully. But when I try Screen Sharing, even with the correct user name and password, I get an authorization failure. I simply cannot start Screen Sharing without intervention, regardless of what I try.
But wait: maybe the problem was that I was not _authorized_ to screen share? So I started up the "Sharing" control panel and sure enough, only "administrators" are allowed to share the screen, and mini User is a Standard User. I unlock the settings using an admin log-in and click the "+" button... and nothing happens. Darn. So I switch _to_ that Admin account and in Sharing, click "+", and I'm able to add mini User. OK. Now, when I try to screen share, my credentials are _still_ rejected
Finally, I started Screen Sharing by logging in as a "Sharing Only" user, to the Virtual Display. I'm presented with a User selection screen. I click mini User, no password, and I can see the screen.
Gee, this all used to work flawlessly in Snow Leopard.

IChat screen sharing problem with AIM

Hi,
I have two laptops - one is a MacBook and the other is a PowerBook. Both are running Leopard. At first, when I had tried using the screen sharing feature of iChat, it had worked flawlessly on both the Bonjour network as well as the AIM network.
Now, for some reason, I cannot get screen sharing to work using the AIM network. I am able to conduct text chats, audio chats and video chats, but no screen sharing over AIM. Screen sharing over the Bonjour network continues to work without a problem.
Any advice?

For some reason ichat does not work when internet sharing is on.
Therefore that might be the problem with your screen sharing since you seem to not be able to get it to work (audio is part of the feature and if you have recently relocated you might not realize that internet sharing is on).

IChat screen sharing through Orange livebox (UK)

I am able to establish video connection through iChat with my father in the UK, but cannot establish screen sharing. After spending time on the phone with Apple support here in Canada, Apple in the UK, and my father's ISP Orange, it appears that the problem is with the Orange "livebox." Orange are telling us that they don't support the feature.
Has anyone else been able to find a workaround so that they can establish screen sharing through a livebox?
Thanks for your help.

Livebox devices tend to be actually made by Sagem
See this list http://portforward.com/routers.htm
IS the model you have listed ?
It may help if the ports are opened by UPnP as Screen Sharing tends to use more random ports that basic Video/Audio chats.
10:23 PM Monday; January 21, 2008

Asking for permission when screen sharing between MBP and Mini?

Hi Guys,
Like many others I have a mini connected to the TV, and use that as my media center, all music, movie, pictures, etc. is shown thrue the mini.
After upgrading to Lion I cannot use screen sharing as before, where I just connected to the mini, and voila I had the full control. Now it seems I have to accept the screen sharing request!?!? Is there a way around this, I surely hope so, because otherwise it will defeat the purpose of my mini! I mean, I have no mouse or keyboard attached to it obviously!
I hope there is an answer to this
Best regards
Viktor

Viktorrrrr,
It appears that Screen Sharing is a bit "buggy" in this first release of Lion.
Having said that, I have managed to get mine working and it is possible to have screen sharing without the approval prompt - the key is that you need to connect using the same account that is already logged on at the machine you're connecting to. So, in your case, after you click "Share Screen..." on your MBP, you should enter the account name and password that matches the account currently logged on your Mac Mini.
This should be fine if the account currently logged on your Mac Mini is allowed to do Screen Sharing (see the list of users in the "Allow access for:" section of the "Sharing--->Screen Sharing" system prefs).
If this works for you, stop reading here!
However, if (like me) you log on locally to your Mac Mini with a Standard account, but only allow Administrators to connect to the Mac Mini via Screen Sharing, then you have some extra work to do because, as you know, when you connect via Screen Sharing with one account in order to view the screen of another logged-on account on the Mac Mini, you get the prompt asking for permission. There does not appear to be an option to switch off this behaviour and, I suspect, this behaviour will remain due to privacy/security issues. So, if you want to avoid this prompt, you are going to have to log in using the same account. And to do this, you will need to allow this account to Screen Share.
The quick way to enable this would be to choose the option to "Allow access for: All users" on your Mac Mini - this would then allow your account (and ALL others!) to connect via Screen Sharing. But you really don't want to enable this if you can help it. Much better, would be to create a new local group on your Mac Mini called something like "Screen Share" and populate this group with all the accounts you want to be allowed to connect via Screen Sharing.
To create and populate a new group:-
Go to the "Users & Groups" system pref and click the + below the list of users to bring up the "New Account" window. Where you see the pull-down menu that says "Standard", click on this and select "Group". Enter your new group name and click "Create Group". The new group will be created and you can then select the accounts you want to include in this group (ie. the accounts you want to allow to connect via Screen Sharing) in the "Membership" section - just tick the boxes of the ones you want.
Now go back to the "Sharing-->Screen Sharing" system pref. Where it says "Allow access for:", click the "Only these users:". Now click the + below the list to bring up a window of all users. Make sure "Users & Groups" is selected in the left pane, then click on your newly-created group in the right pane and click "Select".
Sadly, this is where the real bugs seem to be!! When I try to permission my group for access, more often than not, my selected group is not added to the list of allowed access. I have played with this for hours, clicking various options in various sequences, but have not found a pattern. Even when my selected group does get added successfully, I sometimes find access is still not granted to that group and its members!!
I'm afraid it seems to be trial and error at the moment - I guess a fix will come eventually, but for now you just need to keep adding the group, removing it, turning Screen Sharing on then off then on again, try adding again...etc! I CAN tell you that I did eventually get my group to stick and work as intended, so it is possible...but it will take time!
Sorry for the lengthy response. Good luck!
C.

Cannot authenticate screen sharing

Similar Messages

Maybe you are looking for