Git diff and merge with p4merge (OSX)

.gitconfig

[merge]
  keepBackup = false
	tool = p4merge
[mergetool "p4merge"]
	cmd = /Applications/p4merge.app/Contents/Resources/launchp4merge "\"$PWD/$BASE\"" "\"$PWD/$REMOTE\"" "\"$PWD/$LOCAL\"" "\"$PWD/$MERGED\""
	keepTemporaries = false
	trustExitCode = false
	keepBackup = false
[diff]
    tool = p4merge
[difftool "p4merge"]
	cmd = /Applications/p4merge.app/Contents/Resources/launchp4merge "\"$REMOTE\"" "\"$LOCAL\""

@jeff303 googling for the same issue led me to your comment.

It looks like launchp4merge does not like running witout any arguments.
If I run launchp4merge to diff two files and just close the diff window, everything is fine. (even Cmd-Q works)

If I run launchp4merge without any arguments and also don't choose any files to diff after it launches, then a segfault happens.

It stopped working on MacOS Mojave for me :( Please help.

p4merge just opens without files chosen.

I am also getting the segmentation fault issue on Mojave 10.14.5.

It still works with P4Merge/2019.2/1904275. Config should be updated like jeff303 said.

[merge]
  keepBackup = false
	tool = p4merge
[mergetool "p4merge"]
	cmd = /Applications/p4merge.app/Contents/MacOS/p4merge "\"$PWD/$BASE\"" "\"$PWD/$REMOTE\"" "\"$PWD/$LOCAL\"" "\"$PWD/$MERGED\""
	keepTemporaries = false
	trustExitCode = false
	keepBackup = false
[diff]
    tool = p4merge
[difftool "p4merge"]
	cmd = /Applications/p4merge.app/Contents/MacOS/p4merge "\"$REMOTE\"" "\"$LOCAL\""

I was finding that P4merge was leaving unwanted .orig files behind

Adding the following config (to [mergetool] on its own) stopped those files from being created

[mergetool]
        keepBackup = false

Reference: https://stackoverflow.com/questions/1251681/git-mergetool-generates-unwanted-orig-files

[merge]
  keepBackup = false
        tool = p4merge
[mergetool "p4merge"]
        cmd = /Applications/p4merge.app/Contents/MacOS/p4merge "\"$PWD/$BASE\"" "\"$PWD/$REMOTE\"" "\"$PWD/$LOCAL\"" "\"$PWD/$MERGED\""
        keepTemporaries = false
        trustExitCode = false
        keepBackup = false

This is not working on Monterey. Any one get it working?

What error are you seeing @factiondavid ? I no longer use p4merge, and I'm not yet upgraded to Monterey, but if you post more information about what you're seeing I'm sure someone might be able to offer more help.