I temporarily switched to using Sublime Text, because for Macbook Air 4 GB of RAM is not enough for Phpstorm.
The back end problem is still happening with Sublime Text.
This makes me think the problem is more with OS X than with Phpstorm.
Also, the developer from Jetbrains could not reproduce the problem when I posted an error there.
Because of the fiasco of the Macbook Pro 2016, I switched to windows and the problem no longer arises for me. If anyone has a better answer, I will update this.
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