Screen Sharing not Working Grey not Black

Can't seem to find any posts that are helpful with the problem. Was using Screen Sharing with my Inlaws the other night to help them, but now it won't let them share their screen with me. I can share my screen with them but not the otherway around. Has anyone run into this same problem and successfully resolved it?

Hi,
What does the "Grey not Black" refer to ?
I answered the other post in iChat 3's forum but don't remember you mentioning it there
http://discussions.apple.com/thread.jspa?threadID=2591696
Use the iChat 3 post for replies please
8:57 PM Friday; September 24, 2010
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"

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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.

Screen Sharing not working on server

One of the (remote) servers I manage no longer allows me to share it's screen. The error I get says that screen sharing is disabled.
I attempted to fix it using kickstart, and while kickstart reported no errors, I'm still unable to share the screen.
For reference, this is the kickstart command I used:
sudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart -activate -configure -access -on -users admin -privs -all -restart -agent -menu
I've also noticed that there are extra interfaces enabled, that are definitely not there on my other servers. Not sure if it's related, but I thought it was worth pointing out.
Any ideas?

My Mini is running server headless and it works fine for Remote Desktop. Are you using ARD or standard Screen Sharing from OSX? Or a VNC client?
Take a look at:
http://technotes.twosmallcoins.com/?p=279
For some notes on how to start the VNC server from the SSH command line.
But, screen sharing should work for you.

Screen sharing not working Lion Server

I can't connect to my Lion Server from any other Mac. I got it working for a few minutes after the first restart but I can't get it to work now. It's a Mac mini server runnning headless. I've even tried connecting it to a TV for a screen and it looks like everything is still set correctly for screen sharing under remote management. I can connect via the Server Admin app (pretty slim compared to 10.6) and via ssh fine. Services seem to be running OK.
For the life of me I can't see what the problem is. It worked fine under 10.6.8 before upgrading.

My Mini is running server headless and it works fine for Remote Desktop. Are you using ARD or standard Screen Sharing from OSX? Or a VNC client?
Take a look at:
http://technotes.twosmallcoins.com/?p=279
For some notes on how to start the VNC server from the SSH command line.
But, screen sharing should work for you.

IChat screen sharing not working

My elderly father just replaced his aging egg-shaped iMac with a Mac Mini. He's always had trouble really understanding UI concepts and I'm constantly having to fix things and show how to do operations repeatedly. Poor eyesight doesn't help, either. I would love to be able to share his screen from my house and avoid the ultimately frustrating experience of trying to explain how to do something over the phone or by email.
Yet, I can't get screen sharing to work. Yes, I have configured his computer to do so.
Could the problem be that he has Road Runner's slowest connection rate (something like 768 Kbs) while I have 15 Mbs? He has stubbornly refused to upgrade even to mid-level speed, even though I have offered to pay the difference. Do you think a 2 Mbs rate would allow screen sharing to work?

Someone else was having trouble with screen sharing and 10.6.4, and used this method to fix it:
http://discussions.apple.com/thread.jspa?messageID=11724189#11724189

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 doesnt work on LAN

So I tried to screen share to my iMac yesterday and all that would come up on my MacBook is a small black screen. If I establish the connection manually by IP address with screen sharing it works fine but if I use the screen sharing button in the finder it doesn't work for me. I can go from my iMac to my MacBook and iBook G4 to MacBook. Have in mind its a fresh format computer all up to date. It did work after the reformat but for some reason its not wanting to work for me now. Im not running an admin account (I choose to not run as admin.) Now if I log into my admin account I can access my iMac on screen sharing and it works fine. So is there somewhere I need clear a cache or something to maybe fix this problem Anybody heard of this?

Same issue found I will try this when I get home
http://discussions.apple.com/thread.jspa?threadID=1730539&tstart=0

Screen sharing stopped working after last update

Hello all,
I have run software update yesterday, and there were about 10 downloads (I run this weekely, so these must have been new ones). The thing is that after installing all the updates, one of the features that I use more frequently, screen sharing, stopped working properly. I have a Mac Book Pro and an I Mac, both running on Snow Leopard, and screen sharing has always worked just fine, but not after the latest update.
I checked passwords and they are all right, and also checked sharing properties and all seems to be fine. I can share files all right, but for screen sharing now is only possible by setting the option "anyone may request permission to control screen" (under sharing>screen sharing>computer settings) to on, and ask for authorization each time I need to share screens, not good, mainly if you have the computers in different rooms.
Finally, I own an Me account, so I tried sharing screen via Back to my Mac, but it didn't work either.
Can anyone help?
Thanks a lot,
Luis

Problem solved!
After working with Apple, I have an answer. It looks like the 10.10.2 update changed your firewall settings. Try this:
System Preferences>Security and Privacy>Firewall Options
Scroll down the list till you find "screensharingd". If it's marked as block in coming connections, change it to allow incoming connections.
Be sure to reboot your computer and you should be good to go!

Does any one have any luck getting screen sharing to work in Skype 2.x

Does any one have any luck getting screen sharing to work in Skype 2.x?

The current skype app works (makes calls) with iphone, ipod touch as well as the current ipad, per the description of the app. The ipad is obviously not going to be able to make video calls, but I know the iphone 4 can make video calls to a PC through skype. Works really well too. Im assuming that with the ipad 2 you should be able to make video calls as you can with iphone / ipod touch.

Does iMessage screen sharing still works with Yosemite ?

Till maverick, the Screen Sharing feature was perfectly working with AIM or jabber/Gtalk.
Since Yosemite I can't use anymore the function. It never works.
Sometimes the sound (audio chat) work but never the screen view.
Is there anything new in Yosemite to make it working ?

Hi,
In Yosemite the AIM and Jabber (Google) Screen Sharing still works.
However the iMessages account can now Invoke the System Screen Sharing (See System Preferences > Sharing > Screen Sharing that has to be Enabled).
this works like the Video and Audio Chats in that another App is invoked rather than use the feature already in the app.
Of course the Contact (rather than Buddy) also needs to have th Screen Sharing is System Preferences turned On.
In the Video Menu > Connection Doctor are you getting any info when it fails ?
10:25 pm Wednesday; December 31, 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

Screen Sharing Not Working (All Black)

Hi All,
Using LCCS, and since the latest Flash Player Update Screen Sharing has not been working.
Regardless if I share Desktop or specific Applications the Attendee only sees a black screen. (See Pic Attached)
Any ideas why this might be happening?
I am not sure if this is related to the latest Flash update, but I noticed the problem right after I installed.
Thanks for any help.
Dan

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

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

Remote Desktop & Screen Sharing not working??

Hello all,
I am trying to connect to a friends computer via the Finder's Screen Sharing, I enabled the screen sharing preferences under the System Preferences, put the password, etc and had him do the same and I am not able to connect to his system. I'm sure there is something else I have to do in order to get this to work. In the Windows world I had to use the VNC. But, I remeber reading in a Snow Leopard book that this is all that had to be done in order for this to work.
Best Regards,
freesparks

I know I could never get this working between two macs of the same OS (10.5.8) over the internet with the appropriate Sharing settings set up....
Im guessing both Screen Sharing and Remote Access through iChat DO NOT work anywhere but in a LAN?

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.

Screen Sharing not Working Grey not Black

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