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todd's solution worked for me, but not at first. tried a reboot and that didn't work either. then i read the bit about two time check boxes. ticked that and i was able to sign straight in 🙂

now i wonder if just checking the time zone thing might have worked?

anyway, thanks todd.

After a reboot, this worked perfectly! Thank you!

FYI for anyone with similar circumstances: My logic board was recently replaced due to a faulty video card. After reading posts on this forum, I tried various fixes unsuccessfully and then checked the serial number on the system and the computer doesn't show it. I was told by Apple Support that there is no DYI fix and that I need to take my laptop back into my local Genius Bar so the logic board can be "serialized" and that is it a fairly simple and quick process.

Thanks toddwest24. Worked for me. Other people say they did not need to restart after fixing the hosts file, but it wouldn't work for me until I restarted, so if todd's solution isn't fixing the problem, try restarting.

Followed the instruction, but it still didnt work. What should I do?

Have you completely shutdown and restarted your machine? That usually fixes everything.

Yes, i did that too, but it still doesnt fix the problem.

OK, I've been having trouble signing in, as noted by many people above (& below). I tried checking the box under "Set time zone automatically using current location" and I was able to finally log in.

Now the question here is: I've been using facetime up to about 2 hours ago, from several international locations just fine - why would it suddenly start getting all wobbly?

The only thing I changed was to try adding another email address to my profile. That was when facetime started getting "petulant". This might have been the source of all the trouble.

S

Beautiful, thank you for your response. By simply changing my "date and time" options to automatically search for my time zone, iMessage ended up working. The only thing that didn't work out was that the time was wrong. All I had to do was simply manually changed the time back to what the proper time was. The only reason why iMessage wouldn't let me connect was the fact that the "find my timezone automatically" button was not checked.

Thanks again!

how do I know what to delete once I'm in the terminal ??

same thing is happening to me.. HELP

Worked perfectly.......thank you!!

An excellent piece of information. My logic board was also changed...and since...Facetime don't work. Looked in the 'about this mac' info and no serial number present. To be honest it puts the proverbial icing on the cake. When Apple changed my logic board they did just that, and NOTHING ELSE. My date was set to 2005...so couldn't access internet until i had worked that out...spent ages stressing about why my laptop was worse than when i took it in for repair (for a loose headphone socket!!)...everything on my mac was reset...no-one at the Applestore took time to talk to me properly about the issues i might face with a new board. Nice of them to fit a £400 logic board for free in order to fix a 50p headphone socket, but the hours of wondering why my laptop doesn't work as it should have made up for that convenience.

This website also helped! I was trying the way that everyone said was so successful, but I couldn't replace the host file back into /etc without it saying copy along with the original. http://jonathansblog.co.uk/how-to-fix-cannot-verify-login-with-facetime-or-imess ages-osx-mountain-lion

the /ect cannot be found?