iMac device name issue

[1ONE]

I have a 2011.5 iMac and recently did a "clean" install of Yosemite. I have done clean installs previously of Mountain Lion and Mavericks, respectively.

For some reason, since installing Yosemite I have been unable to get the device name to stay the way I want it. I re-name it under Settings/Sharing/Computer Name and it reverts back to what you see here:

Any ideas why? I just want it to be Jason's iMac.

Thanks in advance

 

[Intell]

Look here: https://forums.macrumors.com/threads/1804719/

 

[1ONE]

Thanks very much. Unfortunately none of those fix my issue. BUT, I feel more at ease knowing I didn't screw up my install or something. It looks to be a Yosemite bug.