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.

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I have 10.9.4. I had remote management switched on and it was working fine.
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I also need to remote to this Mac and so set the preference in ARD to allow control whilst the app was running. Thats when it went pear shaped.
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I now have to be physically at the unit. I have removed ARD and all the files it has added and switched off all screen sharing and Remote Management in Sys Pref. Restarted and switched on Remote Management again.
I can still not access the machine remotely (i.e. screen sharing).
When trying to use screen sharing on the Mac itself to remote onto another machine I get the following in Console.
20/08/2014 15:08:23.459 Screen Sharing[1422]: unable to get server port
20/08/2014 15:08:23.459 Screen Sharing[1422]: *** -[__NSSetM addObject:]: object cannot be nil
20/08/2014 15:08:23.537 Screen Sharing[1422]: (
0   CoreFoundation                      0x00007fff93cd525c __exceptionPreprocess + 172
1   libobjc.A.dylib                     0x00007fff94276e75 objc_exception_throw + 43
2   CoreFoundation                      0x00007fff93bf4966 -[__NSSetM addObject:] + 790
3   ScreenSharing                       0x00007fff91f3a0e2 -[SSInputEventSourceCoordinator addSource:] + 69
4   CoreFoundation                      0x00007fff93ca3e0c __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
5   CoreFoundation                      0x00007fff93b9782d _CFXNotificationPost + 2893
6   Foundation                          0x00007fff905277ba -[NSNotificationCenter postNotificationName:object:userInfo:] + 68
7   AppKit                              0x00007fff96fb1cde -[NSApplication finishLaunching] + 440
8   AppKit                              0x00007fff96fb17f3 -[NSApplication run] + 128
9   AppKit                              0x00007fff96f9c783 NSApplicationMain + 940
10 libdyld.dylib                       0x00007fff8f5b55fd start + 1
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Regards
Keith

Further,
I have run a port scan and confirmed that port 5900 is open.
When using COTVNC it sort of sits there trying to connect but doesn't show the screen. If whilst it is trying I switch off Remote Management then COTVNC instantly throws up the error that screen sharing is not enabled.
Thus I am deducing that the actual VNC server of the os is goosed.

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.

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 SSH sessions freeze occasionally on multiple mac minis

I have 28 Mac Minis at work. With such a large number of minis, I obviously can't have a monitor attached to each of them so I've got them plugged into a network switch and access them via Screen Sharing (both via regular Screen Sharing and ARD) and SSH sessions.
A few of them seem to suffer from intermittent problems however. I'll be using Screen Sharing when the session freezes. It may unfreeze eventually, but I can also usually just quit out and re-connect and it will be unfrozen. The same thing happens when I'm connected via SSH, it will freeze and I won't be able to type in any more commands.
I need help troubleshooting (or if anyone knows what could be causing this, that'd be cool too).
I've tried connecting from both a Mac Pro on the wired network and a MacBook Pro on the wireless network. The freezing seems to only happen on certain Mac Minis as well.
I've tried switching network cables from a Mac Mini that doesn't suffer from this problem with one that does and nothing changed.
I also thought it might be a bandwidth issue at first, despite being a gigabit switch connected via cat6 to the rest of our gigabit network, but even when no significant bandwidth is being used, the freezing still occurs.
One more thing I want to test is the connection between the switch all these Mac Minis is plugged into and one of the other switches that all our other network traffic goes through. I didn't set it up myself so I fear that it might be an old, damaged cable or something. Failing that, I have no idea what the problem could be, which is why I'm posting here.
So, does anyone have any idea what the problem could be? Or any other ideas for troubleshooting the problem? Thanks.
(They're all running 10.6.8, and range from Mid-2007 to 2009 models).

It would be in the system log. However, the next step would be to safe-boot in order to eliminate third-party system modifications. That goes for both client and server. If you can reproduce the problem in safe mode, then you probably have a network issue. Take everything offline except one client and one server, and test.

Screen sharing with remote Mac

hi,
my mom got herself a used MacBook but she is new to computing. she keeps on calling me about troubleshooting issues. helping her over the phone is cumbersome.
how would i go about using screen sharing to take control of her Mac from home ? what needs to be installed on my Mac and hers ? what information is required on my Mac to access hers over the WWW ? is there a step-by-step instruction/manual out there ? do i need VNC or ARD ?
sorry if this sounds dumb - new to this part of networking ...

Please do not hijack someone else's thread, especially one that has been answered. You can not give points to helpful contributes unless you start your own thread.
Am I wrong in searching help and seeing you have to have Back to My Mac subscribed to to make this happen OUTSIDE of iChat,
No, it is possible to make connections without iChat and without a MobileMe subscription. It is just harder.
as in by pulling an alias out of CoreServices folder in the primary System folder and putting it in the dock?
You do not need to create a Screen Sharing alias, you can use Finder -> Go -> Connect to Server -> vnc://address.of.vnc.server. You can create Safari bookmarks with vnc://adddress.of.vnc.server and use them. You can drag those Safari URLs to a folder, and create double-clickable files that will also launch the Screen Sharing utility.
Otherwise, outside of using iChat it seems 10.5.8 and up have lots of built in ability to use the built in version of VNC such as ScreenSharing .app and whatnot, but seems to me most all of the remote or sharing key items require a .Mac account or be used BEHIND a LAN, not through a WAN...
Am I wrong in this?
Well, you can use TeamViewer.com, LogMeIn.com, GoToMyPC.com, and maybe a few other services. These would be easy. They all have the same thing in common with iChat and MobileMe. There is a server that both systems talk to, that handles exchanging IP addresses, and since both system make the out-bound connection, this solves the "How do I get though the home router firewall protections" question.
If you want to roll your own, then you get to figure out how to have your home router port forward the Screen Sharing port 5900 from the internet side to your Mac, and the file sharing port 548 (if you want file sharing over the internet).
Now you need to get the IP address assigned to your router, and give that to the person attempting to make a Screen Sharing connection. WhatIsMyIP.com is one such service. Or you can get a free dynamic DNS name from a serivce such as No-IP.com or DynDNS.org, and then download one of their dynamic DNS name updating utilities, which you install on your Mac and run in the background so your dynamic DNS names stays updated whenever your ISP changes your router's IP address.
Now from the Mac making the connection, you use Finder -> Go -> Connect to Server -> vnc://address.of.your.router, or for file sharing afp://address.of.your.router.
NOTE: Doing this exposes known ports to malicious "Bots" that will attempt to break into your Mac, so make sure you use a very secure password. Yet another feature for the above services, as you do not open in-bound ports.
Also NOTE: These roll your own connections may not be encrypted. I think there is an option in Screen Sharing that will make the Mac to Mac Screen Sharing connections encrypted, but that does not apply if you are talking to a Windows or Unix/Linux VNC server. I do not think the file sharing connections are encrypted. The above services do provide end-to-end encryption for screen sharing and file transfers.
If you want end-to-end encryption in a roll your own environment, you can use ssh tunnels, however, that is another layer of complexity. If you enjoy that sort of thing (and some of use do), that is another avenue you can pursue.
If you have any further questions about screen or file sharing please start a new thread where you can assign points for Helpful answers and Solutions. It isn't much, but the people that give you good answers deserve something for their efforts.

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Can somebody with ARD tell me if the following setup is going to work? There's no demo version so I can't tell if it's going to be worth 300 dollars.
I have a number of local machines in a network and a couple external machines in other parts of the state that VPN in to the network. I want to be able to have a local machine that can screen share w/ voice reliably with these guys.
"Reliably" being the key. iChat screen sharing and VNC alternatives do not work reliably at all. They crash, they are slow, they sometimes disconnect video and keep the audio. Or some days they work perfectly, but that's few and far between. Zero-conf services like MacHelpMate work just fine, but I'm reluctant to pay 600 a year for something like this.
Is ARD going to be able to be able to fix this problem for me, or am I really just going to end up with more of the same issues?

ARD uses VNC for observation and control, so if you're having problems with iChat screen sharing and with VNC clients, I would not expect that ARD would be any better. My suspicion is that your network and/or VPN are cutting things off, since most people have found iChat sharing and VNC to be pretty reliable, but without being able to perform reliability tests on your network to VPN clients, I can't say for sure.

Screen Sharing and Drive Sharing

Hey all!
I've got a Mac Mini that I am using to share files. I have an external drive attached via FireWire. The SMB and AFP shares only show up for the EXTERNAL drive when someone is logged in. Is this the expected behavior? Does anyone else have this happen?
This isn't all! I've noticed that when I use Screen Sharing and click "Return to Login" from the upper right corner, that I loose my Screen Sharing connection AND AM UNABLE TO CONNECT AGAIN. I've been able to reproduce this behavior on my Mini, MB, and MBP. Anyone else experience this?
Thanks in advance!
Jason

Thanks for the ideas! I kinda figured drive sharing wouldn't work from the login screen...seems kinda bogus though, but I guess if I want that, then I'd have to get OS X Server.
As for Screen Sharing, I disagree. When I connect to a Mac via Screen Sharing from the login screen, it lets me choose a logon and login. When I choose to go back to the login screen...the screen freezes. When I hook back up to the Mini from the console, the screen is frozen on a blue screen. No mouse, no keyboard. I believe it worked under a previous version of OS X 10.5...so I'm not sure if 10.5.4 messed it up...
Thoughts?

Screen Sharing and video chats don't work

I've been searching this forum for awhile and I haven't found a concrete answer to my problem, so if this question has been answered please excuse me. Ok, So here's my situation am running iChat on Mac OS 10.5.1. Whenever I am using my laptop at my school on the network their, I am able to use both screen sharing and video chat. But when I am at home, I am unable to use either one. It begins to try to start the session, but then i receive a message that tells me that a connection could not be established. I know that I have internet access, but I don't know what could be wrong with it.

After investing far to long in looking at this exact issue on my end, reading the seemingly endless threads on the exact same error, trying all the various tweeks and QT settings, bandwidth limit settings, etc etc. proposed here, I have now solved this problem, and the none of the above were part of the solution.
I have perhaps one of the the most common routers on the market, Linksys WRT54GL.
In a totally unrelated network problem (a printing issue), Linksys tech support advised me to reset my router. There is a small button on the bottom. I depressed it for 30 seconds. Rebooted everything and my printer miraculously worked. Yea, I had to reenter my WAP passkey, router admin password etc., but that took 2 secs. So, what does this have to do with iChat?.... The very next time I tried iChat video and turned on and enabled my camera, the recipient immedialty saw me. No connection error.
Problem solved, for me art least. Not sure if anyone has tried this, but makes sooooo much more sense than the other unApple like suggestions I previous tried. Hope this helps.

Screen sharing and yosemite

I have 2 iMacs running 10.10.1 not on the same LAN. Under Mavericks both screen sharing and file sharing worked fine on both computers
Since the upgrade to yosemite, i can access file and screen sharing on one computer but only file sharing on the other.
Both computers have back to my mac activated. Since screen sharing works fine on one computer, I must assume a setting somewhere is incorrect
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Screensharing doesn't require a 'bonjour advertisement'. The advertisement causes other Macs to add it to the sidebar - but that is just to help cut out manual config.
You could try working out the IP address of the Mac see if Screensharing works that way. Find that in Network Prefernces for the interface that is on the same local network.
Insert the following into Safari…
vnc://YOUR-IP-OF-REMOTE-MAC
That will open the Screensharing app (which is buried in the System folder) and attempt to open the IP of the machine in question. If that works you know sharing is OK but mDNS a.k.a bonjour is failing somewhere. If that fails double check the local IP & retest. It indicates screensharing itself is failing etc.
You can also try the computer names like 'Macbook.local' instead of the IP address.

LION screen sharing and remote log in issues

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