I recently installed ChemDraw Professional 17.1 on my imac (new iMac, latest OS) and find that many of my old document are not recognized if I try to open them from ChemDraw. I can right-click on the document and open them fine but if I modify and try to save, I get the spinning ball forever.

Also, new documents don't get a proper icon. It's just a default sheet. If I do a get info, it shows a different icon. I've tried the fix of changing the icon and appying universally and it doesn't seem to work. They seem to like the Avagadro icon.

I've thrown away everything ChemDraw, restarted and done a clean install.

I've been using ChemDraw since beta 0.87 so I'm not a confused newbie. Lots of flakiness with ChemDraw 17.1 on the mac.

Everything about 17.1 works fine on the PC. Same files show the right icons, open and save fine, etc.

Hmmm! I seem to have solved the problem. I threw away everything associated with Avogadro and all seems right with the world. The little icons started changing everywhere and the file, that would give a spinning ball when saved, started behaving.

And I spelled Avogadro right in this post.

Now to see if I can reinstall Avogadro without messing everything up again.