Subject: See #39999

From: "W. Lincoln Harvey" <[email-masked]>
Date: Wed, 29 Apr 2020 11:28:10 -0700

This problem is discussed in #39999; sorry.  
The error is caused by MacOS using BSD sed, which requires a mandatory argument of a zero-length string to the -i option to edit a file in-place, whereas Gnu sed has an optional argument to the -i option to edit a file in-place.  
The different syntax causes the "file not found" error.

wlh