Using Beyond Compare with Version Control Systems (macOS)

Git 2.3 and newer

(Note: Use bc3 on the command line for BC version 4. Caused by git legacy support from Linux.)

Launch Beyond Compare, go to the Beyond Compare menu and run Install Command Line Tools.

Diff

git config --global diff.tool bc3

To launch a diff using Beyond Compare, use the command: git difftool file.ext

Merge

git config --global merge.tool bc3
git config --global mergetool.bc3.trustExitCode true

To launch a 3-way merge using Beyond Compare, use the command:

git mergetool file.ext

官方参考链接