FaceTime: version of OS X is too new to install

The Facetime Application, along with i message, comes already installed in the Lion and Mountain Lion operating systems. That's why you are getting the error message that your OS X is too new. You should be able to find it in your applications folder. All you need to do is to go through the activation process.

Yes it is, for operating systems up to, and including snow leopard 10.6.8. However that changed with 10.7 and 10.8

chdbco,

Unfortunately, I believe to get Facetime back, you'd need to reinstall Mountain Lion. From what I've been hearing, Mountain Lion seems to have some conflicts with some FaceTime users.

Perhaps, you may want to just consider going with a video chat system such as Skype, since reinstalling10.8 may be a bit of work, and you may wind up with the same problem.

I have been getting this message for awhile and finally decided to find out why. When I researched the version in the app store I found it is version 1.0.2 updated March 2011. The version I am using with mountain lion 10.8.2 is version 2.0 . So I think that the version we have from mountain lion is newer and we don't need or want to update it even tough the appstore thinks we should. So I am sure glad I didn't go through the trouble of reinstalling mountain Lion or worse using some terminal command which would have removed the version I have which works fine.