Hi, I see something in logs that may indicate the problem:
EBUSY: resource busy or locked, open '/dev/rdisk2'","stack":"Error: EBUSY: resource busy or locked, open '/dev/rdisk2'
You can see the post where other users have similar problem. Can you try to run etcher as suggested in post?
sudo /Applications/balenaEtcher.app/Contents/MacOS/balenaEtcher