adb cannot connect to daemon at tcp:5037

If you have updated to Platform Tools 25.0.4(you can check running android from command line) and it’s not working

Just download previous stable version e.g: https://dl.google.com/android/repository/platform-tools_r25.0.2-macosx.zip

Then go to your Android SDK home directory and replace platform-tools folder with the downloaded one.

Then do:

ps aux | grep 5037
kill -9 <pid of process of your incorrectly running adb>

And go

adb devices

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