This application failed to start because it could not find or load the Qt platform plugin "cocoa".

by frank · April 14, 2016

This application failed to start because it could not find or load the Qt platform plugin "cocoa".

Solution: You are missing the macdeployqt step:

$> macdeployqt My\ Super\ App.app -always-overwrite
$> macdeployqt My\ Super\ App.app -no-plugins

More reading at official Qt documentation.

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