Craig,

Please send to support@wolfram.com:

• the MacOS crash report (not the same as the console messages),

• a notebook that this crash happens with,

• a notebook with the output from evaluating SystemInformation[], and

• the output from the System Profiler / System Information application. Click on the Apple menu - About this Mac, click "More Info...",

-- in System Profiler click File menu - Save As to save the information in a file and send me that (Text format preferred).

-- in newer Macs, in the System Information application click the System Report button and save the window of information (File menu - Save).

In the subject line or early in the body of the email, include "Community Discussion 366763".

Thank you.

My reflex is to suggest resetting initialization files to default contents.

The Mathematica preference and cache files can be reset by holding
down the SHIFT and OPTION keys as Mathematica starts. If that does
not correct it, the bigger hammer is to delete the folder
~/Library/Mathematica/FrontEnd/
under your home directory. It might be necessary to do this again
after restarting your computer.
(See also http://support.wolfram.com/kb/12464 .)

Have you tried different resolution settings?