Why does Screen Sharing between Macs no longer work?

Just recently many of my Mac computers have stopped Screen Sharing with each other. I cannot think of any reason why this would begin happening. These computers are 'system critical' computers so I haven't updated to Mavericks yet. One is an iMac running OS X 10.8 and the other is a Mac Mini running 10.7. Any clues?

This could be something as simple as a bad Router Port. Try switching the Ethernet cable on one of the effected Macs to a port that you know is working. When I was running computer labs, bad ports were a commmon issue. If that doen't work we will move on to other possible solutions.

Similar Messages

Networking/screen sharing between Mac and PC

I have a standard home wired/wireless network using a DHCP router. My main computer is a Mac Pro running Snow Leopard (latest everything). My secondary computer is a Windows 7 PC, which has IP address 192.168.2.94.
On the Mac Pro, in the Finder sidebar, under shared, I do see the PC: it's called "rackpc". If I click on it, I see the option to Connect As, but if I click it, it says Connection Failed (the server "rackpc" may not exist or it is unavailable at this time). The screen sharing button doesn't appear (as it does for other Macs in my network).
However, if I manually use the Finder's command-K (connect to server) and type in vnc://192.168.2.94, I can easily connect to the PC and share its screen.
So my question is: how can I "save" this bookmark of vnc://192.168.2.94 (or better yet, make the Mac auto-sense the rackpc's existence, which it partially does) and allow it to appear properly in the Shared list of servers on my local network? Right now it appears there, but as I said above, Connect As doesn't work, and Screen Sharing doesn't appear.
The rackpc is not on a fixed IP because I can't figure out how to do that in Windows. So it's grabbing .94 from the router, which is fine by me for now.

See if this Apple Tech Note helps:
http://support.apple.com/kb/HT1812?viewlocale=en_US

Why does google (and only google) no longer work in toolbar search box?

The search box on the Firefox toolbar - not the google toolbar- no longer works if google is selected as search engine, gives a not found error to any search. Other search engines work, but google is broken. Google works fine anywhere else, just not from stock toolbar search box. Windows XP, Firefox 16.0.1.

Thanks for the help, but that didn't work. "keyword.URL" was not bold and it wouldn't allow me to select reset. what next?

Why does timer code (by dbasnett) no longer work splendidly?

Using timer code supplied by dbasnett back in May2014, I was able to see FPS of near 500 for a simple animation. Now, with a more recent 64bit laptop Win 8.1 - - I run the same code - - - and see poor results similar to standard timers - - where the
results are "stepped" - - -like either 16FPS or 32FPS or the max I can get is 64FPS.
This thread back in May2014 - -https://social.msdn.microsoft.com/Forums/vstudio/en-US/9ddb2f16-796a-483a-aa3f-0f9b959e0eea/the-use-of-systemwindowsformstimer-for-time?forum=vbgeneral
And here is the code that dbasnett supplied - -
Public Class Form1
Dim R As Integer
Dim D, T As Double
Private Sub Form1_Load(sender As Object, e As System.EventArgs) Handles Me.Load
Me.ClientSize = New Size(500, 500)
Me.DoubleBuffered = True
T = Environment.TickCount
timeSubThrd = New Threading.Thread(AddressOf timeSub)
timeSubThrd.IsBackground = True
timeSubThrd.Start()
End Sub
Private Sub Form1_FormClosing(sender As Object, e As FormClosingEventArgs) Handles Me.FormClosing
If Not slp.WaitOne(0) Then
'RemoveHandler Me.Paint, AddressOf Me.Form1_Paint
slp.Set()
e.Cancel = True
End If
End Sub
Private Sub Form1_Paint(sender As Object, e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
Dim rct As Rectangle = New Rectangle(250 - R, 250 - R, 2 * R, 2 * R)
Using spen As New Pen(Color.FromArgb(83, 32, 69))
spen.Width = 4
e.Graphics.DrawEllipse(spen, rct)
End Using
End Sub
Dim timeSubThrd As Threading.Thread
Dim slp As New Threading.ManualResetEvent(False)
Private Sub timeSub()
Dim A As Double = -1
Do
D += 0.125663707
If D > (2 * Math.PI) Then
A = 50000 / (Environment.TickCount - T)
T = Environment.TickCount
D = 0
End If
R = CInt(Math.Cos(D) * 60) + 180
Me.Invoke(Sub()
Invalidate()
If A <> -1 Then
Me.Text = A.ToString("##0.0##") & " FPS"
End If
End Sub)
A = -1
Loop While Not slp.WaitOne(20) '<<<<<<< the timer interval
Me.Invoke(Sub()
Me.Close()
End Sub)
End Sub
End Class
With timer interval set to 20 - - - - it used to give about 50FPS (which is should), but it doesnt anymore - - - it gives 32FPS.
Can anybody shed some light on what has gone wrong? My present laptop also a I7 is 4 years younger than my old laptop and has far betters specs. Why is it slower? or why is this timer code no longer acting the same?
Thanks
Leon Stanley - ♪Don't pay the ferryman - till he gets you over to the other side♪ . um . I apply this to corporations - not to God.

@ Reed Kimble. Thanks for your point about not being OS related. That make sense anyway.
@ Mr.Monkeyboy. Thanks for your links and points. I had a bit of a read. Mostly over my head. To me it should'nt be a thread priority question because the program is so simple - there is only one thread anyway.
And I don't think it is a graphics issue, because I altered the program to only manipulate a bitmap - not activate a paint event - - - but it still performs poorly. I only get 32 Cycles Per Second instead of 50 CPS. See - this is how I altered the
code - but no change in performance:-
Public Class Form4
Dim bmp As Bitmap
Dim gfx As Graphics
Dim R As Integer
Dim D, T As Double
Private Sub Form4_Load(sender As Object, e As System.EventArgs) Handles Me.Load
bmp = New Bitmap(500, 500)
gfx = Graphics.FromImage(bmp)
Me.ClientSize = New Size(500, 500)
T = Environment.TickCount
timeSubThrd = New Threading.Thread(AddressOf timeSub)
timeSubThrd.IsBackground = True
timeSubThrd.Start()
End Sub
Private Sub Form2_FormClosing(sender As Object, e As FormClosingEventArgs) Handles Me.FormClosing
If Not slp.WaitOne(0) Then
'RemoveHandler Me.Paint, AddressOf Me.Form2_Paint
slp.Set()
e.Cancel = True
End If
End Sub
Sub test()
Dim rct As Rectangle = New Rectangle(250 - R, 250 - R, 2 * R, 2 * R)
Using spen As New Pen(Color.FromArgb(83, 32, 69))
spen.Width = 4
gfx.DrawEllipse(spen, rct)
End Using
End Sub
Dim timeSubThrd As Threading.Thread
Dim slp As New Threading.ManualResetEvent(False)
Private Sub timeSub()
Dim A As Double = -1
Do
D += 0.125663707
If D > (2 * Math.PI) Then
A = 50000 / (Environment.TickCount - T)
T = Environment.TickCount
D = 0
End If
R = CInt(Math.Cos(D) * 60) + 180
Me.Invoke(Sub()
test()
If A <> -1 Then
Me.Text = A.ToString("##0.0##") & " CPS"
End If
End Sub)
A = -1
Loop While Not slp.WaitOne(20) '<<<<<<< the timer interval
Me.Invoke(Sub()
Me.Close()
End Sub)
End Sub
End Class
PS - I changed the code so that it does not deal with bitmaps or graphics at all - - - but still no improvement.
Maybe it is Framework Version issue ??
Thanks all
Top Tip: Toothache? Cut paper towel to 2"square. Smear with olive oil. Sprinkle on Cayenne Pepper. Fold over few times to form small wad. Tuck in between wall of mouth and gum. Leave 1 - 2 hrs. You will thank me!

File sharing between macs oddly not working

I'm trying to share folders between two macs running Lion (at work so sharing is important) but the one computer doesn't connect.
The problem.
Mac1 is set up to share and appears in the shared list on Mac2.
When Mac2 tries to connect to Mac1, I have a Connection Failed with a pop up that reads
"There was a problem connecting to the server " 'Users' iMac".
Check the server name or IP address, and then try again. If
you continue to have problems, contact your system administrator."
Mac1 can actually connect to the shared folders on Mac2 so there only seems to be a conflict 1 way..
I don't have any other alerts throughout the system that relates to IP address and Mac1's name is correct.
Really puzzled. My knowledge of IP address and problems with IP conflicts is limited so I'm not sure how to get things to work..
Hope you can help.
iMac1 - 27-inch, Mid 2011, OS X 10.7.4
iMac2 - 24-inch, Early 2009, OS X 10.7.4

Hello,
Find IP on computers...
http://www.helpdesk.umd.edu/topics/communication/ethernet/office/winxp/2882/
On this one In finder, select Go menu>Connect to Servers..., type in afp://ip.of.another.computer, like...
afp://10.0.1.5
afp://192.168.1.3

LR5.4: Why does automatic lens correction profile no longer work for SONY NEX-5N?

Starting in LR5.4, if I attempt to apply automatic lens profile corrections, LR applies a profile for a Hasselblad LF 18-55 camera lens instead.
Formerly, in LR 5.3, the 'make' in the lens profile pane automatially matched the EXIF 'make' of the NEX-5N; namely, "Sony", and the correct lens profile was applied automatically.
In LR5.4, I must now manually select make = "Sony E" to appy a "setup=custom" profile before LR applies the correct lens profile. The minute I set 'make=Sony E', LR applies a profile that matches the lens in use: either the "Sony E 18-55mm F3.5-F5.6 OSS", the "Sony E 16mm F2.8 OSS" lens or the "Sony E 55-210mm F4.5-6.3 OSS" lens that I use.
Another issue: I am not certain of this, but I swear the LR5.4 lens profile correction now *increases* pin-cushion image distortion, whereas it worked beautifully in LR5.3. (I should take a photograph of a grid to see if my impression is correct.) Are the lens profile corrections applied to a camera with EXIF make="Sony E" different from those applied to an EXIF make="Sony" (i.e., the NEX-5N)? If so, this is a shame, for it means LR no longer fully supports the NEX-5N.
Does anyone know how to resolve this problem?
(I believe LR5.4 may have picked up on recent product line changes announced by SONY, wherein NEX will be marketed as Sony Alpha E cameras, and I imagine they will be changing the EXIF 'make' of new cameras to reflect this. However, that won't be changing the EXIF make of my NEX-5N.)

Why is that so and how can I get the proper lens profile automatically if the lens does have its own Adobe profile loaded?
Frustrated ...
Pick the correct lens manually then choose 'Save New Lens Profile Defaults' from Setup drop down menu. Lr should remember the lens and use it as the default in future. See screenshot below

Why does my external hard drive no longer work

I have a toshiba 1tb external hard drive on which I back up my Toshiba lap top. This morning when I tried to do this both USB ports on the laptop died. Thats a very short explanation for what has taken some time to establish. To get them working again I have to reboot the laptop & then I can use my wireless mouse & keyboard etc. Attach the harddrive again everything dies.
Now the point that got me to this board is that I gave my hard drive to a colleague to copy some files (which he did) but he runs a mac! Has his mac killed my hard drive & done something that somehow means when it plugs into my laptop it kills the USB drives on that too?

Bob you might just be right. He might have killed the cable though. I've managed to find a similar connection & I now seem to have access. Is that a natural breeding rainbow or one of those bloated stockies?

Why does my hotmail account account no longer work right? Cannot forward or reply to messages without the original message being lost. Hotmail says it is a problem with the latest Firefox update.

When I try to forward or reply to my emails in my Hotmail account, the original message disappears. Hotmail says it is a compatibility problem with the newest version of Firefox. They suggested I use Internet Explorer. Would prefer to use my old version of Firefox. How do I get it back? Or how can I get my hotmail account to work properly with the 3.6.3 version?
== URL of affected sites ==
http://hotmail.com

When I try to forward or reply to my emails in my Hotmail account, the original message disappears. Hotmail says it is a compatibility problem with the newest version of Firefox. They suggested I use Internet Explorer. Would prefer to use my old version of Firefox. How do I get it back? Or how can I get my hotmail account to work properly with the 3.6.3 version?
== URL of affected sites ==
http://hotmail.com

Screen sharing between Lion and Snow Leopard

Does anyone know whether it is possible to do Screen Sharing between two Macs where one is using lion and the other Snow Leopard? I use this feature to help my father with his computer problems but am wary about upgrading my machine to Lion without an assurance that it will work across OS's. He is in Europe where I believe Lion a) may not yet have been released and b) think it unlikely anyway that I will be able to encourage him to change something he is already finding difficult (aged 84) having never had to use a computer prior to 3 years ago at my behest.

after reading your post, i thought i'd do the same on my lion machine -- toggle screen sharing off and back on -- only to discover that it was *already* off, although it was positively enabled on the same machine when running snow leopard.
i never disabled it, as i use the feature quite regularly, which is why it never occurred to me to check the sharing settings, because i always leave screen sharing on. but apparently installing lion either caused the setting to revert, or it's possible lion simply installs with screen-sharing off by default. (who knows.)
regardless -- a simple fix.
thanks.

Why does print sharing keep unchecking in system preferences

Why does print sharing keep unchecking?

If your information footer is correct, you need to upgrade to Mac OS X 10.7.2 or higher, then iCloud will appear in the system preferences window.

Is it possible to use screen sharing between lion and mountain lion

I could always use screen sharing between my 2010 macbook and my 2007 macmini,both with lion.But now since I upgraded the macbook to mountain loin it doesn't work.The macmini did at first show up on the macbook finder sidebar under sharing like it always had done but as soon as I tried to connect the sharing option disappeared and won't come back.The macmini can still see the macbook however,its on the finder there.But when I try to connect from the mini to the macbook I get an error message that says something like "server error" and contact administrator(that's me!)I can't upgrade the mini to mountain lion as it's too old.So it this an incompatibility between the two operating systems or is it something else?
I also tried to do it with BackTo My Mac,enabled through icloud on both computers but no luck,not even showing the Back to my Mac icon on either Finder sidebar like it's supposed to.When I did it through system preferences-icloud,it said this was successfully enabled but it just doesn't work at all.
Cross about this since I always use the macbook to control the macmini which is plugged into a flat screen tv and it's much easier than fiddling around with a mouse and keyboard.

I can screen share my wife's Lion iMac using Mountain Lion and the reverse is true. If the computer is not showing up to be selected under shard on the left column of the finder it is probable a connection issue. I would check my home network, restart the the macs and toggle the sharded settings and energy saving settings like wake for network activity. Be sure and set up iCloud on both your macs and turn on UPnP if you have a router for your home network serving up NAT IP Numbers. UPnG will make the port forwarding enteries in you router to allow you macs to connect behind the firewall created by nat addressing.
I am currently having a problem with back to my mac. S
creen shares great the the Lion iMac but Mountain Lion to Mountain on one computer will not connect if the computer is sleeping. It lights the screen on the sleeping computer but never shows on the computer requesting to share. File share always workd. If I wake the computere before I attemp the connection, screen share work as it should. If I try to screen share while the second computer is sleeping, It will never work again until I restart the iMac.

ITunes sharing between Mac and PC is not working

iTunes sharing between Mac and PC is not working. No shared music appears.
PC = Win XP SP3; 192.168.1.101
iTunes for Windows 6.0.4.2
Sharing enabled / Look for shared music enabled / Share entire library
Open and running on PC
Windows firewall has exceptions set to allow traffic on TCP 3689, UDP 5353
MAC = OS X 10.4.6; 192.168.1.100
iTunes for OS X 6.0.4(3)
Sharing enabled / Look for shared music enabled / Share entire library
Open and running on Mac
System Preferences | Sharing | Services
Personal file sharing - ON
Windows file sharing - ON
Printer sharing - ON
System Preferences | Sharing | Firewall
Personal file sharing - ON
Windows file sharing - ON
Printer sharing - ON
iTunes Music Sharing - ON (i.e., TCP 3689 open)
iPhoto Bonjour Sharing - ON
Network Time - ON
ROUTER = Linksys BEFSR41v4; Firmware 1.04.01; 192.168.1.1
Functioning as DHCP server
File sharing between Mac & PC works OK
BUT iTUNES MUSIC SHARING DOES NOT WORK IN EITHER DIRECTION
Shared music is not visible
Tried turning both firewalls OFF -- still nothing
Tried installing Bonjour for Windows -- still nothing
ANY suggestions? Please help. Thanks.
1.8 GHz PowerPC G5 Mac OS X (10.4.6)

Hi cbafiero,
It seems that the problem lies in your router. I'm not sure exactly what the issue is (I've just now discovered it myself), but after switching from a Linksys WRT54GX2 to a thrift store Netgear, my shared libraries appeared instantly. My gut is telling me that the Linksys routers are blocking the multicast traffic, which is stupid on Linksys's part, to filter traffic internally. I'll look more into the Netgear and see what it has that the Linksys doesn't (or vice versa).

Why does my iPad Air takes a long time to charge?

Why does my iPad Air takes a long time to charge?

You need to provide more detail. What do you mean by "a long time?" Are you charging it plugged into a wall socket?
Barry

WHY does screen freeze when downloading ios8 to ipad

downloading ios8 why does screen freeze at TERMS AND CONDITIONS after tapping AGREE?

It sounds like you have a slow and/or erratic Internet connection or WiFi router problems (these can be worse if you have a weak WiFi signal).
Get the SpeedTest App to check your Internet speed and consistency.

Why does my iPad say printer no longer available?

Why does my iPad say printer no longer available?

The printer is either off or no longer on the same network as iPad.
Try rebooting router and printer.

Why does Screen Sharing between Macs no longer work?

Similar Messages

Maybe you are looking for