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An error occurred while saving the commentTycenjmccann commented
A decent workaround I have been using is to Mirror your main display (i.e. the book) to one of your monitors, then when you close you have a "mirrored" display and an extended display.
Not ideal but it does give the same feel as if clamshell was working properly.
To do this you go to the Arrangement tab, then cmd + option and drag the external display you want mirrored over the main display and drop.Tycenjmccann supported this idea ·