Hi Mike,
Not currently.  You can use command “open formats” to list the current ChimeraX formats in the Log.

The data formats are listed with a little more detail in the documentation for “open” (input) and “save” (output) commands. Input formats:
<http://rbvi.ucsf.edu/chimerax/docs/user/commands/open.html#local>

You may be able to use Chimera (not ChimeraX) to read XYZ and output PDB, if you don’t have any other converter handy.
I hope this helps,
Elaine
-----
Elaine C. Meng, Ph.D.
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco

> On May 25, 2017, at 4:10 PM, Mike Goodstadt <mikegoodstadt@gmail.com> wrote:
>
> Hi!
> Many thanks for the great work on this new version.
> Does ChimeraX support XYZ files?
> Chimera did but I get an “unrecognized filetype” error in ChimeraX.
> Best regards,
> Mike Goodstadt