Can't sign in on iMessage and FaceTime after upgrading to ML

Just don't forget to run a few commands after you have copied hosts file back to the /private/etc

sudo chown root hosts

sudo chgrp wheel hosts

sudo chmod 666 hosts

Access permissions are absolutely critical in UNIX - maybe the reason for the next trouble

Thanks man this was the right isue for me 🙂

I encountered the same issue.

after reading the whole thread, I thought it was due to dns issue.

I tried the combo of solutions above, it finally worked.

the steps I managed to fix it:

1). remove com.apple.imservice.iMessage.plist

2). reset /etc/hosts (you may have an original version of hosts file named hosts~orig)

(if you were in China, see additional steps 🙂)

3). kill the imagent process(which will restart immidiately).

4). restart your facetime and(or) imessage, try loging in.

additional steps:

a). reset your dns (removing the well-known 74.117.62.158 from your network dns setting)

b). try connecting to a us vpn.

/Users/<your account>/Library/Preferences/com.apple.imservice.iMessage.plist

HI,

The Home Folder/Library (or ~/Library) is hidden in both Lion and Mountain Lion

With the Finder as the "front" app use the Go Menu > Go to Folder.

In the Dialogue box that appears type ~/Library/Preferences (The "~" replaces Hard drive/Users/(your account) )

Drag the item to the Trash and restart the Messages app.

8:36 PM Friday; November 23, 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 10.8.2)
 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
"Limit the Logs to the Bits above Binary Images."  No, Seriously

Looks like the latest software upgrade addresses the issue. I was having the same problem (not being able to sign in to iMessage with my Apple ID or use FaceTime), but after the software upgrade everything is fine.

HI,

It seems the latest "Supplemental" update is only for certain models of Mac and more people than have those models seem to be effected.

7:23 PM Sunday; November 25, 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 10.8.2)
 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
"Limit the Logs to the Bits above Binary Images."  No, Seriously

I too have been fighting an issue where I couldn't sign in to Messages and Back to My Mac wasn't connecting either. I don't use Facetime so I am not sure if that was working or not. The solution to my problem was that my computer's serial number was not programmed into the logic board. If you go to Apple>About This Mac and click on More Info... and it says something like My Computer Serial# next to Serial Number it means the computer's serial number isn't programmed into the logic board. I took my MBP to an Apple Store and they "Serialized the logic board". After that Messages and Back to My Mac started working.

If a MBP's logic board is replaced the technician is supposed to program the comptuer's serial number into it. If they don't you have this problem.

Same problem. I have a iMac with same setup and everything runs ok. I have messages, facetime and "backup to my Mac". Yesterday I did a clean install on my MBP 3.1 of 10.8.2 and I can't login in this services. I already tried everything, without sucess, so I think that I have the same problem. Last year, my MBP had the "nvidia" problem and I have to replace my logic boad. Today I notice that I don't have any serial associated...

Hi,

It does seem that most people who see this problem in OS X 10.8.2 are seeing it because the Serial Number was not flashed back to the reinstalled Logic board.

The only "cure" is to have the Store or Apple Authorised Service Provider restore the Serial Number.

It appears it is held on an EPROM chip

8:07 PM Saturday; December 1, 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 10.8.2)
 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
"Limit the Logs to the Bits above Binary Images."  No, Seriously

I had the same problem. After read this post, I send my Macbook Pro to official resseler to put the serial to my new logic board. Now I have my MBP again and the problem is solved

Thanks

Good to hear.

8:43 PM Saturday; December 15, 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 10.8.2)
 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
"Limit the Logs to the Bits above Binary Images."  No, Seriously

OKAY...Is there a SIMPLE easy way of fixing this for the normal Mac user who doesnt understand a thing about going into codes and files and blank screens??

ALL of this is pretty foreign, I just want to make the iMessage work without a problem as it should-

After doing a lot, I STILL HAVE THE PROBLEM of being asked to sign in numerous times without ever getting logged in...Can some one help us users who need things in "laymens terms"???

My password is correct! I've deleted and installed it all over again. I've used icloud.com and me.com NOTHING.