Qt Wallet (for mac) does not start up.
You can boot it by installing boost (ver.1.67).
Currently installing boost installs 1.68, so you need to revert to the past version.
The procedure is as follows.
$ brew install boost
$ cd /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core/Formula/
$ git fetch --unshallow
$ git checkout c33598d1a8 boost.rb
$ brew uninstall boost
$ HOMEBREW_NO_AUTO_UPDATE=1 brew install boost
$ git reset HEAD
$ git checkout .