On Sep 28, 2020, at 10:52, Ryan Schmidt wrote: > > >> And I am on OS X 10.6.8 on this machine; forgot to say that upfront. > > Ok. I'll see if I can test on 10.6. Well it works for me on 10.6 too. You could try adding the -verbose flag when you invoke convert but I'm not sure it would tell us much more.