Ah Mac. Hmm. I've had it happen a few times myself (on a PC) but a restart has always cleared it up. The only other thing I can think of is if the OBJ is corrupted, but in that case the figure itself is missing in the scene as well.

Mind you, there's a chair included in the Poser 8 content (for that saloon ow whatever it was) which does the same. It's even locked halfway in the floor. It's clearly there, but with no properties. Never quite figured that one out either...

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.