The state of Meld on Macs is currently in flux. TLDR: currently, the best
way to run Meld is to install Homebrew and then run
brew install dehesselle-meld
.
Update 2025-04-21: Starting today, it seems that Homebrew renamed the
dehesselle-meld
cask to just meld
, https://formulae.brew.sh/cask/meld.
So, brew install --cask meld
should work (possibly after updating
Homebrew), and simple brew install meld
might work too.