Meld v3.21.0 (r4) hot-fix for macOS on Intel CPU / Apple Silicon CPU with Rosetta

meld_hotfix_sonoma.sh

### Test on https://github.com/yousseb/meld/releases/tag/osx-20
### OSX - 3.21.0 (r4) Sonoma
### !!! Note: You need put the Meld.app r4 build to the /Applications path first.

#!/bin/zsh

#Fix libpng16.16.dylib not found
install_name_tool -change /usr/local/opt/libpng/lib/libpng16.16.dylib @executable_path/../Frameworks/libpng16.16.dylib /Applications/Meld.app/Contents/Frameworks/libfreetype.6.20.0.dylib

#Fix libbrotlidec.1.dylib not found
install_name_tool -change /usr/local/opt/brotli/lib/libbrotlidec.1.dylib @executable_path/../Frameworks/libbrotlidec.1.dylib /Applications/Meld.app/Contents/Frameworks/libfreetype.6.20.0.dylib

#Make MacOS trust Meld.app
xattr -rd com.apple.quarantine /Applications/Meld.app

#Removes the existing code signature
codesign --remove-signature /Applications/Meld.app

#Re-signs with system’s default certificate
codesign --force --deep --sign - /Applications/Meld.app

#if CPU type is Apple silicon, use Rosetta to execute
/usr/libexec/PlistBuddy -c "Set :LSRequiresNativeExecution false" /Applications/Meld.app/Contents/Info.plist

#Try to open Meld
open /Applications/Meld.app

#Meld CLI Setup
curl https://gist.githubusercontent.com/syneart/4a8724cd479d31f0f742f499f807dcb2/raw/meld_setup_cli.sh | zsh

meld_setup_cli.sh

#!/bin/zsh
RC_FILES=( .bashrc .zshrc )
for RC_FILE in "${RC_FILES[@]}"
do
  [ -f ~/${RC_FILE} ] && {
    ( cat ~/${RC_FILE} | grep "alias meld=" ) && {
        echo "Already put it at ~/${RC_FILE}"
    }|| {
        echo "alias meld='meld_script(){ /Applications/Meld.app/Contents/MacOS/Meld \$* 2>/dev/null & };meld_script'" >> ~/${RC_FILE}
        . ~/${RC_FILE}
        echo "Put it at ~/${RC_FILE} .. ok"
    }
  }
done
echo "[!] You may need to reopen your Terminal."

z_readme

1. Download the official **3.21.0 osx4 (r4 pre-release)** [https://github.com/yousseb/meld/releases/tag/osx-20] version. 
2. Move the Meld.app file to the /Applications directory. 
3. Execute the hot-fix script at CLI with the following command (**only one line**): 
`curl https://gist.githubusercontent.com/syneart/4a8724cd479d31f0f742f499f807dcb2/raw/meld_hotfix_sonoma.sh | zsh`

@syneart Thank you. It's working again.

@syneart Thanks for sharing this! It solved the crashing issue when running any diff on macOS 15.0 (on M3 Pro).

A combination of the hotfix command above and running BOTH the code signing commands worked for me; having just downloaded latest meld onto brand-new macBook Pro M4 :)

Thank you,
It works for me
M2 Pro Sonora 14.6.1

For macOS 15.1 (24B83)
The application “(null)” does not have permission to open “(null)”.

@k4u5hik, @stevejordi Thank you for the feedback. I have already made adjustments for this issue. You can simply run the hot-fix script again to continue using Meld.app.

-> Execute the hot-fix script at CLI with the following command (only one line): curl https://gist.githubusercontent.com/syneart/4a8724cd479d31f0f742f499f807dcb2/raw/meld_hotfix_sonoma.sh | zsh

If it still fails, you can go through the process again.

1. First, Remove the original Meld.app located in the /Applications directory.
2. And, go to https://github.com/yousseb/meld/releases/tag/osx-20 and download the official 3.21.0 osx4 (r4 pre-release) version.
3. Move the Meld.app file to the /Applications directory.
4. Execute the hot-fix script at CLI with the following command (only one line):
   curl https://gist.githubusercontent.com/syneart/4a8724cd479d31f0f742f499f807dcb2/raw/meld_hotfix_sonoma.sh | zsh

perfect! Thanks. Works like a charm on M1 Sequoia 15.1.1.

For macOS 15.1 (24B83)
The application “(null)” does not have permission to open “(null)”.

@k4u5hik, @stevejordi Thank you for the feedback. I have already made adjustments for this issue. You can simply run the hot-fix script again to continue using Meld.app.

-> Execute the hot-fix script at CLI with the following command (only one line): curl https://gist.githubusercontent.com/syneart/4a8724cd479d31f0f742f499f807dcb2/raw/meld_hotfix_sonoma.sh | zsh

If it still fails, you can go through the process again.

1. First, Remove the original Meld.app located in the /Applications directory.
2. And, go to https://github.com/yousseb/meld/releases/tag/osx-20 and download the official 3.21.0 osx4 (r4 pre-release) version.
3. Move the Meld.app file to the /Applications directory.
4. Execute the hot-fix script at CLI with the following command (only one line):
   curl https://gist.githubusercontent.com/syneart/4a8724cd479d31f0f742f499f807dcb2/raw/meld_hotfix_sonoma.sh | zsh

@syneart @Sunac Thanks to these, meld works well from both command line and Applications, but I'm not able to configure it as a difftool/mergetool with git. After adding the settings suggested at https://yousseb.github.io/meld/ to .gitconfig, when I execute git difftool, the following error appears on the right side of the window (the left side is loaded ok):
There was a problem opening the file “filepath”.
Error opening file /filepath: No such file or directory
Please help me with the right config.

Thanks a lot, you save my day :)

Thank you so much! Meld is the best tool for the job and you saved the day!

could anybody provide the right configs for git difftool/mergetool, please?

@rolandkozma-sg

[difftool "meld"]
    cmd = /Applications/Meld.app/Contents/MacOS/Meld "$LOCAL" "$REMOTE" 2>/dev/null

This has been working for me. Though I've been having to blindly answer "Launch meld?" by hitting return. I think that's caused by something else in my terminal/git config setup though.

Edit: oh, and mergetool should be:

[mergetool "meld"]
    cmd = /Applications/Meld.app/Contents/MacOS/Meld "$LOCAL" "$BASE" "$REMOTE" --output "$MERGED" 2>/dev/null

Thanks @liamjones!