macOS and Battlenet app issue
(reinstallation all the time)

For anyone having hard time to run this command, step by step guide is here:

Download Battlenet app. Rename Battle.net-Setup.app to bnet.app for the future reference. Move it to Applications folder. Open Terminal/iTerm2

cd /Applications
./bnet.app/Contents/MacOS/Battle.net-Setup setup

source: https://us.forums.blizzard.com/en/blizzard/t/bnet-installing-stuck-at-45/46675/73