Using DiffMerge as your git mergetool (for Mac OS X / macOS)

USING-DIFFMERGE.md

Using DiffMerge as your git mergetool (for Mac OS X / macOS)

Reference(s):

• http://twobitlabs.com/2011/08/install-diffmerge-git-mac-os-x/
• http://stackoverflow.com/a/1251696

Step 1: download and install the DiffMerge OS X Installer

http://www.sourcegear.com/diffmerge/downloads.php - get the installer version, NOT the dmg version

Step 2: configure it

git config --global diff.tool diffmerge
git config --global difftool.diffmerge.cmd 'diffmerge "$LOCAL" "$REMOTE"'
git config --global merge.tool diffmerge
git config --global mergetool.diffmerge.cmd 'diffmerge --merge --result="$MERGED" "$LOCAL" "$(if test -f "$BASE"; then echo "$BASE"; else echo "$LOCAL"; fi)" "$REMOTE"'
git config --global mergetool.diffmerge.trustExitCode true
git config --global mergetool.keepBackup false

Step 3: use it

Any time you encounter a merge conflict, just do git mergetool

Via brew installing of diffmerge looks simple:
brew install --cask diffmerge