Configure gitignore and remove .DS_Store files

find . -name .DS_Store -print0 | xargs -0 git rm --ignore-unmatch
echo .DS_Store >> .gitignore
echo .DS_Store >> ~/.gitignore_global
git config --global core.excludesfile ~/.gitignore_global

Ref

• [1] Stack Overflow - .gitignore all the .DS_Store files in every folder and subfolder