Not a Mac guy here.
Many months ago I wrote the following command in a bash script on a Mac.
export AUTH=$(echo -n "$USER_ID:$SVC_KEY" | base64)
It worked as you would expect, the base64 of "value_of_USER_ID:value_of_SVC_KEY". Months later I run it and the output is the base64 of "-n value_of_USER_ID:value_of_SVC_KEY".
InB4 yes, it took me a while to figure out that this was the problem :-)
What setting changed to cause the "-n " to be included? How do I change it back?
Thanks!