Using SED to delete lines in a file on MacOS

I needed to delete a set of lines from a file. I didn’t realise the Mac version of sed is a bit different to the Linux one. So what I had tried first was

sed -i -e '/<your pattern>/d' yourfile.txt

and

sed -ie '/<your pattern>/d' yourfile.txt

So what you end up with after these is file copies ending in e or -e so you end up with backups yourfile.txte and yourfile.txt-e

What you need to do is give the inline edit -i an extension to work with, even if that’s blank (if you don’t want the backup). So

sed -i '' -e '/<your pattern>/d' yourfile.txt